Skip to content

Efficacy and Safety of Cefepime/Nacubactam or Aztreonam/Nacubactam Compared to Imipenem/Cilastatin in Subjects With Complicated Urinary Tract Infections or Acute Uncomplicated Pyelonephritis

A Phase 3, Multi-Center, Randomized, Double-Blind Study to Evaluate the Efficacy and Safety of Cefepime/Nacubactam or Aztreonam/Nacubactam Compared to Imipenem/Cilastatin in the Treatment of Complicated Urinary Tract Infections or Acute Uncomplicated Pyelonephritis, in Adults

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05887908
Acronym
Integral-1
Enrollment
614
Registered
2023-06-05
Start date
2023-05-23
Completion date
2024-11-26
Last updated
2025-12-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Complicated Urinary Tract Infection, Acute Pyelonephritis, cUTI, AP

Keywords

OP0595, nacubactam, Integral

Brief summary

Phase 3 study to evaluate the efficacy and safety of cefepime/nacubactam or aztreonam/nacubactam compared to imipenem/cilastatin in the treatment of complicated urinary tract infections (cUTI) or acute uncomplicated pyelonephritis (AP).

Interventions

2 g cefepime and 1 g nacubactam

2 g aztreonama and 1 g nacubactam

1 g imipenem/1 g cilastatin

Sponsors

Meiji Seika Pharma Co., Ltd.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Male or female patients at least18 years of age (or age of legal consent, whichever is older) at the time of obtaining informed consent and who can be hospitalized throughout the Treatment Period; 2. Weight at most 140 kg; 3. Expectation, in the opinion of the Investigator, that the patient's cUTI or AP will require treatment with at least 5 days of IV antibiotics;

Exclusion criteria

1. Has a known imipenem- and/or meropenem-resistant Gram-negative uropathogen (at least 10\^5 CFU/mL), isolated from study-qualifying urine culture; Note: If after randomization the susceptibility testing indicates resistance to imipenem and/or meropenem, the patient may remain on the study drug at the Investigator's discretion. 2. Has known or suspected single or concurrent infection with Acinetobacter spp. or other organisms that are not adequately covered by the study drug (eg, concurrent viral, mycobacterial, or fungal infection) and needs to be managed with other anti-infectives; Note: Patients with qualifying pathogen coinfected with a Gram-positive pathogen may be administered narrow spectrum, open-label glycopeptide (eg, vancomycin), oxazolidinone (eg, linezolid), or daptomycin concomitantly with the study drug at the Investigator's discretion. 3. Has only a known Gram-positive primary uropathogen (at least 10\^5 CFU/mL), isolated from study qualifying urine culture;

Design outcomes

Primary

MeasureTime frameDescription
Proportion of Patients Who Achieve Composite Clinical and Microbiological Success at TOC (Test of Cure Visit) in the Microbiological Modified Intent-to-Treat (m-MITT) PopulationTOC (Test of Cure visit): 7 [±2] days after EOT (end of treatment) [Day 10 to 23 after the start of treatment]Composite clinical and microbiological success is defined as the composite clinical outcome of cure and the microbiological outcome of eradication.

Secondary

MeasureTime frameDescription
Proportion of Patients With a Clinical Outcome of CureOutcome measurements were assessed at various visits: EA (Earlly Assessment): Day4, EOT (End of Treatment): Day5 to Day14, TOC (Test of Cure visit): Day10 to Day 23, FUP (Follow-Up visit): Day17 to Day30Assessment of clinical outcome was based on Investigator's evaluation of the patient's clinical signs and symptoms, with cure defined as the complete resolution (or return to premorbid state) of the baseline signs and symptoms of cUTI or AP that were present at screening, such that no further antimicrobial therapy is warranted. The results of subgroup analyses for only the two most frequent pathogens were shown because there were a large number of pathogen types, most of which were rare and sparsely represented in the dataset.
Proportion of Patients With a Microbiological Outcome of EradicationOutcome measurements were assessed at various visits: EA (Earlly Assessment): Day4, EOT (End of Treatment): Day5 to Day14, TOC (Test of Cure visit): Day10 to Day 23, FUP (Follow-Up visit): Day17 to Day30Microbiological outcome was determined programmatically based on quantitative microbiological urine cultures, with eradication defined as the pathogen found at screening with 10\^5 CFU/ml or more reduced to less than 10\^3 CFU/ml. The results of subgroup analyses for only the two most frequent pathogens were shown because there were a large number of pathogen types, most of which were rare and sparsely represented in the dataset.
Proportion of Patients With a Clinical Outcome of Cure at TOC in Patients With Secondary Bacteremia at BaselineTOC (Test of Cure visit): Day 10 to Day 23 after the start of treatmentPatients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. Assessment of clinical outcome was based on signs and symptoms, with cure defined as complete resolution or significant improvement of the baseline signs and symptoms of secondary bacteremia.
Proportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeOutcome measurements were assessed at various visits: EA (Earlly Assessment): Day4, EOT (End of Treatment): Day5 to Day14, TOC (Test of Cure visit): Day10 to Day 23, FUP (Follow-Up visit): Day17 to Day30Composite clinical and microbiological success is defined as the composite clinical outcome of cure and the microbiological outcome of eradication. Assessment of clinical outcome was based on Investigator's evaluation of the patient's clinical signs and symptoms, with cure defined as the complete resolution (or return to premorbid state) of the baseline signs and symptoms of cUTI or AP that were present at screening, such that no further antimicrobial therapy is warranted. Microbiological outcome was determined programmatically based on quantitative microbiological urine cultures, with eradication defined as the pathogen found at screening with 10\^5 CFU/ml or more reduced to less than 10\^3 CFU/ml. The results of subgroup analyses for only the two most frequent pathogens were shown because there were a large number of pathogen types, most of which were rare and sparsely represented in the dataset.
Proportion of Patients Who Are Free From the Definition of Secondary Bacteremia AND a Clinical Outcome of Cure AND a Microbiological Outcome of Eradication From cUTI or AP at TOC in Patients With Secondary Bacteremia at BaselineTOC (Test of Cure visit): Day 10 to Day 23 after the start of treatmentPatients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. For cUTI/AP,Assessment is done by the same way as Proportion of patients who achieve composite clinical and microbiological outcome. For secondary bacteremia, assessment of clinical outcome was based on signs and symptoms, with cure defined as complete resolution or significant improvement of the baseline signs and symptoms of secondary bacteremia. Microbiological outcome will be determined programmatically based on blood cultures, with eradication defined as the pathogen found at screening is negative in blood culture.
Proportion of Patients Who Are Free From Secondary Bacteremia in Patients With Secondary Bacteremia at TOCTOC (Test of Cure visit): Day 10 to Day 23 after the start of treatmentPatients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. Assessment of clinical outcome was based on signs and symptoms, with cure defined as complete resolution or significant improvement of the baseline signs and symptoms of secondary bacteremia. Microbiological outcome will be determined programmatically based on blood cultures, with eradication defined as the pathogen found at screening is negative in blood culture.
Proportion of Patients With a Microbiological Outcome of Eradication at TOC in Patients With Secondary Bacteremia at BaselineTOC (Test of Cure visit): Day 10 to Day 23 after the start of treatmentPatients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. Microbiological outcome will be determined programmatically based on blood cultures, with eradication defined as the pathogen found at screening is negative in blood culture.

Countries

Bulgaria, China, Czechia, Estonia, Georgia, Japan, Latvia, Lithuania, Slovakia

Participant flow

Recruitment details

A total of 678 patients were screened at 66 sites in 9 countries and 614 patients were radomized.

Participants by arm

ArmCount
Cefepime/Nacubactam
2 g cefepime/1 g nacubactam every 8 hours for at least 5 days and up to 14 days via IV infusion over a period of 60 minutes
214
Aztreonam/Nacubactam
2 g aztreonam/1 g nacubactam every 8 hours for at least 5 days and up to 14 days via IV infusion over a period of 60 minutes
112
Imipenem/Cilastatin
1 g imipenem/1 g cilastatin every 8 hours for at least 5 days and up to 14 days via IV infusion over a period of 60 minutes
105
Total431

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event611
Overall StudyGrew only a Gram-negative organism resistant to imipenem and/or meropenem001
Overall StudyIneligibility after the start of the study410
Overall StudyOther Reason333
Overall StudyPhysician Decision410
Overall StudyPregnancy010
Overall StudyRequired Use of Prohibited Concomitant Medications100
Overall StudySignificant prolongation of the QT/QTc interval010
Overall StudySubject non-compliance404
Overall StudyWithdrawal by Subject323

Baseline characteristics

CharacteristicCefepime/NacubactamAztreonam/NacubactamImipenem/CilastatinTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
115 Participants70 Participants64 Participants249 Participants
Age, Categorical
Between 18 and 65 years
99 Participants42 Participants41 Participants182 Participants
Age, Continuous63.6 years
STANDARD_DEVIATION 14.83
66.4 years
STANDARD_DEVIATION 14.04
65.5 years
STANDARD_DEVIATION 15.57
64.8 years
STANDARD_DEVIATION 14.83
Age, Customized
Age, Customized
65 - 74 Years
62 Participants36 Participants32 Participants130 Participants
Age, Customized
Age, Customized
<65 years
99 Participants42 Participants41 Participants182 Participants
Age, Customized
Age, Customized
>=75 years
53 Participants34 Participants32 Participants119 Participants
Creatinine Clearance (CrCl) at baseline86.9 mL/min
STANDARD_DEVIATION 34.94
87.8 mL/min
STANDARD_DEVIATION 40.1
82.0 mL/min
STANDARD_DEVIATION 32.43
85.9 mL/min
STANDARD_DEVIATION 35.78
Creatinine Clearance (CrCl) group
>240
0 Participants0 Participants0 Participants0 Participants
Creatinine Clearance (CrCl) group
<30
1 Participants3 Participants0 Participants4 Participants
Creatinine Clearance (CrCl) group
>=30 and <60
46 Participants30 Participants27 Participants103 Participants
Creatinine Clearance (CrCl) group
>=60 and <90
77 Participants30 Participants44 Participants151 Participants
Creatinine Clearance (CrCl) group
>=90 and <=240
88 Participants49 Participants33 Participants170 Participants
Creatinine Clearance (CrCl) group
Data not collected for Creatinine Clearance (CrCl) at baseline
2 Participants0 Participants1 Participants3 Participants
Patients with secondary bacteremia at baseline
No
199 Participants103 Participants95 Participants397 Participants
Patients with secondary bacteremia at baseline
Yes
15 Participants9 Participants10 Participants34 Participants
Primary infection type collected in eCRF
Acute Uncomplicated Pyelonephritis (AP)
77 Participants36 Participants32 Participants145 Participants
Primary infection type collected in eCRF
Complicated Urinary Tract Infection (cUTI)
137 Participants76 Participants73 Participants286 Participants
Prior short-acting antibacterial therapy
No
196 Participants100 Participants93 Participants389 Participants
Prior short-acting antibacterial therapy
Yes
18 Participants12 Participants12 Participants42 Participants
Race/Ethnicity, Customized
Ethnicity, Customized
Hispanic or Latino
1 Participants0 Participants2 Participants3 Participants
Race/Ethnicity, Customized
Ethnicity, Customized
Not Hispanic or Latino
212 Participants112 Participants103 Participants427 Participants
Race/Ethnicity, Customized
Ethnicity, Customized
Unknown
1 Participants0 Participants0 Participants1 Participants
Race/Ethnicity, Customized
Race, Customized
Asian-Chinese
23 Participants9 Participants7 Participants39 Participants
Race/Ethnicity, Customized
Race, Customized
Asian-Japanese
12 Participants6 Participants5 Participants23 Participants
Race/Ethnicity, Customized
Race, Customized
Asian-other
0 Participants1 Participants0 Participants1 Participants
Race/Ethnicity, Customized
Race, Customized
White
179 Participants96 Participants93 Participants368 Participants
Region of Enrollment
China
23 Participants10 Participants7 Participants40 Participants
Region of Enrollment
Japan
12 Participants6 Participants5 Participants23 Participants
Region of Enrollment
Other
179 Participants96 Participants93 Participants368 Participants
Sex: Female, Male
Female
103 Participants51 Participants49 Participants203 Participants
Sex: Female, Male
Male
111 Participants61 Participants56 Participants228 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
1 / 3060 / 1520 / 150
other
Total, other adverse events
100 / 30645 / 15265 / 150
serious
Total, serious adverse events
6 / 3064 / 1525 / 150

Outcome results

Primary

Proportion of Patients Who Achieve Composite Clinical and Microbiological Success at TOC (Test of Cure Visit) in the Microbiological Modified Intent-to-Treat (m-MITT) Population

Composite clinical and microbiological success is defined as the composite clinical outcome of cure and the microbiological outcome of eradication.

Time frame: TOC (Test of Cure visit): 7 [±2] days after EOT (end of treatment) [Day 10 to 23 after the start of treatment]

Population: Microbiological Modified Intent-to-Treat (m-MITT) Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological Success at TOC (Test of Cure Visit) in the Microbiological Modified Intent-to-Treat (m-MITT) Population176 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological Success at TOC (Test of Cure Visit) in the Microbiological Modified Intent-to-Treat (m-MITT) Population81 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological Success at TOC (Test of Cure Visit) in the Microbiological Modified Intent-to-Treat (m-MITT) Population64 Participants
95% CI: [10.9, 32]
95% CI: [-1.2, 23.7]
Secondary

Proportion of Patients Who Achieve Composite Clinical and Microbiological Outcome

Composite clinical and microbiological success is defined as the composite clinical outcome of cure and the microbiological outcome of eradication. Assessment of clinical outcome was based on Investigator's evaluation of the patient's clinical signs and symptoms, with cure defined as the complete resolution (or return to premorbid state) of the baseline signs and symptoms of cUTI or AP that were present at screening, such that no further antimicrobial therapy is warranted. Microbiological outcome was determined programmatically based on quantitative microbiological urine cultures, with eradication defined as the pathogen found at screening with 10\^5 CFU/ml or more reduced to less than 10\^3 CFU/ml. The results of subgroup analyses for only the two most frequent pathogens were shown because there were a large number of pathogen types, most of which were rare and sparsely represented in the dataset.

Time frame: Outcome measurements were assessed at various visits: EA (Earlly Assessment): Day4, EOT (End of Treatment): Day5 to Day14, TOC (Test of Cure visit): Day10 to Day 23, FUP (Follow-Up visit): Day17 to Day30

Population: m-MITT Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP (Follow-up visit)147 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EA (Early Assessment visit)201 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at TOC by baseline pathogen: Escherichia coli135 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP by baseline pathogen: Klebsiella pneumoniae20 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP by baseline pathogen: Escherichia coli112 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at TOC by baseline pathogen: Klebsiella pneumoniae27 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT (End of Treatment visit)199 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT by baseline pathogen: Klebsiella pneumoniae30 Participants
Cefepime/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT by baseline pathogen: Escherichia coli151 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP (Follow-up visit)73 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT (End of Treatment visit)102 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT by baseline pathogen: Klebsiella pneumoniae10 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP by baseline pathogen: Escherichia coli57 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP by baseline pathogen: Klebsiella pneumoniae9 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT by baseline pathogen: Escherichia coli81 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at TOC by baseline pathogen: Escherichia coli62 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EA (Early Assessment visit)110 Participants
Aztreonam/NacubactamProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at TOC by baseline pathogen: Klebsiella pneumoniae11 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP by baseline pathogen: Klebsiella pneumoniae11 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EA (Early Assessment visit)96 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT (End of Treatment visit)94 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP (Follow-up visit)65 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at TOC by baseline pathogen: Escherichia coli45 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at TOC by baseline pathogen: Klebsiella pneumoniae9 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT by baseline pathogen: Escherichia coli66 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at EOT by baseline pathogen: Klebsiella pneumoniae16 Participants
Imipenem/CilastatinProportion of Patients Who Achieve Composite Clinical and Microbiological OutcomeComposite clinical and microbiological success at FUP by baseline pathogen: Escherichia coli44 Participants
Comparison: Composite clinical and microbiological success at EA95% CI: [-3.2, 9.9]
Comparison: Composite clinical and microbiological success at EA95% CI: [1.1, 14]
Comparison: Composite clinical and microbiological success at EOT95% CI: [-2.7, 11.3]
Comparison: Composite clinical and microbiological success at EOT95% CI: [-6.6, 10]
Comparison: Composite clinical and microbiological success at FUP95% CI: [-4.1, 18.1]
Comparison: Composite clinical and microbiological success at FUP95% CI: [-9.5, 16]
Comparison: Composite clinical and microbiological success at TOC by baseline pathogen: Escherichia coli95% CI: [12, 36.6]
Comparison: Composite clinical and microbiological success at TOC by baseline pathogen: Escherichia coli95% CI: [-4.2, 24.9]
Comparison: Composite clinical and microbiological success at TOC by baseline pathogen: Klebsiella pneumoniae95% CI: [1.8, 54.1]
Comparison: Composite clinical and microbiological success at TOC by baseline pathogen: Klebsiella pneumoniae95% CI: [1.1, 61.6]
Comparison: Composite clinical and microbiological success at EOT by baseline pathogen: Escherichia coli95% CI: [-1.3, 16.3]
Comparison: Composite clinical and microbiological success at EOT by baseline pathogen: Escherichia coli95% CI: [-5.6, 14.7]
Comparison: Composite clinical and microbiological success at EOT by baseline pathogen: Klebsiella pneumoniae95% CI: [-20.3, 13.9]
Comparison: Composite clinical and microbiological success at EOT by baseline pathogen: Klebsiella pneumoniae95% CI: [-45.4, 5.2]
Comparison: Composite clinical and microbiological success at FUP by baseline pathogen: Escherichia coli95% CI: [-1.7, 24.4]
Comparison: Composite clinical and microbiological success at FUP by baseline pathogen: Escherichia coli95% CI: [-8.7, 20.9]
Comparison: Composite clinical and microbiological success at FUP by baseline pathogen: Klebsiella pneumoniae95% CI: [-31.9, 23.1]
Comparison: Composite clinical and microbiological success at FUP by baseline pathogen: Klebsiella pneumoniae95% CI: [-28.8, 37.9]
Secondary

Proportion of Patients Who Are Free From Secondary Bacteremia in Patients With Secondary Bacteremia at TOC

Patients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. Assessment of clinical outcome was based on signs and symptoms, with cure defined as complete resolution or significant improvement of the baseline signs and symptoms of secondary bacteremia. Microbiological outcome will be determined programmatically based on blood cultures, with eradication defined as the pathogen found at screening is negative in blood culture.

Time frame: TOC (Test of Cure visit): Day 10 to Day 23 after the start of treatment

Population: Patients with secondary bacteremia at baseline in m-MITT Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients Who Are Free From Secondary Bacteremia in Patients With Secondary Bacteremia at TOC12 Participants
Aztreonam/NacubactamProportion of Patients Who Are Free From Secondary Bacteremia in Patients With Secondary Bacteremia at TOC8 Participants
Imipenem/CilastatinProportion of Patients Who Are Free From Secondary Bacteremia in Patients With Secondary Bacteremia at TOC6 Participants
95% CI: [-16, 54.3]
95% CI: [-13, 62.1]
Secondary

Proportion of Patients Who Are Free From the Definition of Secondary Bacteremia AND a Clinical Outcome of Cure AND a Microbiological Outcome of Eradication From cUTI or AP at TOC in Patients With Secondary Bacteremia at Baseline

Patients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. For cUTI/AP,Assessment is done by the same way as Proportion of patients who achieve composite clinical and microbiological outcome. For secondary bacteremia, assessment of clinical outcome was based on signs and symptoms, with cure defined as complete resolution or significant improvement of the baseline signs and symptoms of secondary bacteremia. Microbiological outcome will be determined programmatically based on blood cultures, with eradication defined as the pathogen found at screening is negative in blood culture.

Time frame: TOC (Test of Cure visit): Day 10 to Day 23 after the start of treatment

Population: Patients with secondary bacteremia at baseline in m-MITT Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients Who Are Free From the Definition of Secondary Bacteremia AND a Clinical Outcome of Cure AND a Microbiological Outcome of Eradication From cUTI or AP at TOC in Patients With Secondary Bacteremia at Baseline11 Participants
Aztreonam/NacubactamProportion of Patients Who Are Free From the Definition of Secondary Bacteremia AND a Clinical Outcome of Cure AND a Microbiological Outcome of Eradication From cUTI or AP at TOC in Patients With Secondary Bacteremia at Baseline4 Participants
Imipenem/CilastatinProportion of Patients Who Are Free From the Definition of Secondary Bacteremia AND a Clinical Outcome of Cure AND a Microbiological Outcome of Eradication From cUTI or AP at TOC in Patients With Secondary Bacteremia at Baseline2 Participants
95% CI: [12.8, 78.1]
95% CI: [-18.4, 60.5]
Secondary

Proportion of Patients With a Clinical Outcome of Cure

Assessment of clinical outcome was based on Investigator's evaluation of the patient's clinical signs and symptoms, with cure defined as the complete resolution (or return to premorbid state) of the baseline signs and symptoms of cUTI or AP that were present at screening, such that no further antimicrobial therapy is warranted. The results of subgroup analyses for only the two most frequent pathogens were shown because there were a large number of pathogen types, most of which were rare and sparsely represented in the dataset.

Time frame: Outcome measurements were assessed at various visits: EA (Earlly Assessment): Day4, EOT (End of Treatment): Day5 to Day14, TOC (Test of Cure visit): Day10 to Day 23, FUP (Follow-Up visit): Day17 to Day30

Population: m-MITT Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT204 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC by baseline pathogen: Escherichia coli148 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC by baseline pathogen: Klebsiella pneumoniae30 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC195 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP by baseline pathogen: Klebsiella pneumoniae28 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA9 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP by baseline pathogen: Escherichia coli143 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP188 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA by baseline pathogen: Escherichia coli5 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT by baseline pathogen: Klebsiella pneumoniae31 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA by baseline pathogen: Klebsiella pneumoniae2 Participants
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT by baseline pathogen: Escherichia coli155 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT by baseline pathogen: Klebsiella pneumoniae11 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT106 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT by baseline pathogen: Escherichia coli84 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC by baseline pathogen: Escherichia coli82 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP98 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC by baseline pathogen: Klebsiella pneumoniae11 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA4 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP by baseline pathogen: Escherichia coli78 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC103 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA by baseline pathogen: Klebsiella pneumoniae1 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP by baseline pathogen: Klebsiella pneumoniae11 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA by baseline pathogen: Escherichia coli3 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP by baseline pathogen: Klebsiella pneumoniae15 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA by baseline pathogen: Klebsiella pneumoniae0 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA2 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT100 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC92 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP89 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EA by baseline pathogen: Escherichia coli1 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT by baseline pathogen: Escherichia coli71 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at EOT by baseline pathogen: Klebsiella pneumoniae16 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC by baseline pathogen: Escherichia coli67 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at TOC by baseline pathogen: Klebsiella pneumoniae13 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of CureClinical outcome of cure at FUP by baseline pathogen: Escherichia coli62 Participants
Comparison: Clinical outcome of cure at EA95% CI: [-2.8, 6.3]
Comparison: Clinical outcome of cure at EA95% CI: [-3.5, 7.2]
Comparison: Clinical outcome of cure at EOT95% CI: [-4.6, 6.4]
Comparison: Clinical outcome of cure at EOT95% CI: [-7.1, 6]
Comparison: Clinical outcome of cure at TOC95% CI: [-3.3, 11.8]
Comparison: Clinical outcome of cure at TOC95% CI: [-3.9, 13]
Comparison: Clinical outcome of cure at FUP95% CI: [-4.5, 12.1]
Comparison: Clinical outcome of cure at FUP95% CI: [-6.6, 12.3]
Comparison: Clinical outcome of cure at EA by baseline pathogen: Escherichia coli95% CI: [-4.2, 6]
Comparison: Clinical outcome of cure at EA by baseline pathogen: Escherichia coli95% CI: [-4.1, 8.3]
Comparison: Clinical outcome of cure at EA by baseline pathogen: Klebsiella pneumoniae95% CI: [-13.9, 20.3]
Comparison: Clinical outcome of cure at EA by baseline pathogen: Klebsiella pneumoniae95% CI: [-12.6, 36]
Comparison: Clinical outcome of cure at EOT by baseline pathogen: Escherichia coli95% CI: [-3.5, 10.5]
Comparison: Clinical outcome of cure at EOT by baseline pathogen: Escherichia coli95% CI: [-6.9, 9.6]
Comparison: Clinical outcome of cure at EOT by baseline pathogen: Klebsiella pneumoniae95% CI: [-15.9, 16.8]
Comparison: Clinical outcome of cure at EOT by baseline pathogen: Klebsiella pneumoniae95% CI: [-36, 12.6]
Comparison: Clinical outcome of cure at TOC by baseline pathogen: Escherichia coli95% CI: [-4.5, 13.1]
Comparison: Clinical outcome of cure at TOC by baseline pathogen: Escherichia coli95% CI: [-5.3, 14.2]
Comparison: Clinical outcome of cure at TOC by baseline pathogen: Klebsiella pneumoniae95% CI: [-6, 38]
Comparison: Clinical outcome of cure at TOC by baseline pathogen: Klebsiella pneumoniae95% CI: [-20.5, 37.3]
Comparison: Clinical outcome of cure at FUP by baseline pathogen: Escherichia coli95% CI: [-2.6, 17.8]
Comparison: Clinical outcome of cure at FUP by baseline pathogen: Escherichia coli95% CI: [-5, 17.8]
Comparison: Clinical outcome of cure at FUP by baseline pathogen: Klebsiella pneumoniae95% CI: [-23.6, 17.6]
Comparison: Clinical outcome of cure at FUP by baseline pathogen: Klebsiella pneumoniae95% CI: [-30.9, 22.3]
Secondary

Proportion of Patients With a Clinical Outcome of Cure at TOC in Patients With Secondary Bacteremia at Baseline

Patients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. Assessment of clinical outcome was based on signs and symptoms, with cure defined as complete resolution or significant improvement of the baseline signs and symptoms of secondary bacteremia.

Time frame: TOC (Test of Cure visit): Day 10 to Day 23 after the start of treatment

Population: Patients with secondary bacteremia at baseline in m-MITT Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients With a Clinical Outcome of Cure at TOC in Patients With Secondary Bacteremia at Baseline12 Participants
Aztreonam/NacubactamProportion of Patients With a Clinical Outcome of Cure at TOC in Patients With Secondary Bacteremia at Baseline8 Participants
Imipenem/CilastatinProportion of Patients With a Clinical Outcome of Cure at TOC in Patients With Secondary Bacteremia at Baseline6 Participants
95% CI: [-16, 54.3]
95% CI: [-13, 62.1]
Secondary

Proportion of Patients With a Microbiological Outcome of Eradication

Microbiological outcome was determined programmatically based on quantitative microbiological urine cultures, with eradication defined as the pathogen found at screening with 10\^5 CFU/ml or more reduced to less than 10\^3 CFU/ml. The results of subgroup analyses for only the two most frequent pathogens were shown because there were a large number of pathogen types, most of which were rare and sparsely represented in the dataset.

Time frame: Outcome measurements were assessed at various visits: EA (Earlly Assessment): Day4, EOT (End of Treatment): Day5 to Day14, TOC (Test of Cure visit): Day10 to Day 23, FUP (Follow-Up visit): Day17 to Day30

Population: m-MITT Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC184 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP by baseline pathogen: Escherichia coli119 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA205 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT203 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP157 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA by baseline pathogen: Escherichia coli155 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA by baseline pathogen: Klebsiella pneumoniae30 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT by baseline pathogen: Escherichia coli154 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT by baseline pathogen: Klebsiella pneumoniae30 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC by baseline pathogen: Escherichia coli141 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC by baseline pathogen: Klebsiella pneumoniae27 Participants
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP by baseline pathogen: Klebsiella pneumoniae22 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP75 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP by baseline pathogen: Escherichia coli58 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC by baseline pathogen: Klebsiella pneumoniae11 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP by baseline pathogen: Klebsiella pneumoniae9 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA by baseline pathogen: Klebsiella pneumoniae12 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT by baseline pathogen: Klebsiella pneumoniae11 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA112 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC by baseline pathogen: Escherichia coli63 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA by baseline pathogen: Escherichia coli89 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT105 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT by baseline pathogen: Escherichia coli83 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC83 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT by baseline pathogen: Escherichia coli67 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP68 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA by baseline pathogen: Escherichia coli71 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC by baseline pathogen: Escherichia coli47 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA by baseline pathogen: Klebsiella pneumoniae13 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP by baseline pathogen: Escherichia coli46 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC67 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at TOC by baseline pathogen: Klebsiella pneumoniae10 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at FUP by baseline pathogen: Klebsiella pneumoniae12 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EA97 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT by baseline pathogen: Klebsiella pneumoniae16 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of EradicationMicrobiological outcome of eradication at EOT95 Participants
Comparison: Microbiological outcome of eradication at EA95% CI: [-1.7, 10.5]
Comparison: Microbiological outcome of eradication at EA95% CI: [3.9, 14.3]
Comparison: Microbiological outcome of eradication at EOT95% CI: [-1.3, 11.9]
Comparison: Microbiological outcome of eradication at EOT95% CI: [-4.2, 11.2]
Comparison: Microbiological outcome of eradication at TOC95% CI: [12.2, 32.7]
Comparison: Microbiological outcome of eradication at TOC95% CI: [-2, 22.5]
Comparison: Microbiological outcome of eradication at FUP95% CI: [-2, 19.7]
Comparison: Microbiological outcome of eradication at FUP95% CI: [-10.4, 14.8]
Comparison: Microbiological outcome of eradication at EA by baseline pathogen: Escherichia coli95% CI: [-3.5, 10.5]
Comparison: Microbiological outcome of eradication at EA by baseline pathogen: Escherichia coli95% CI: [2.3, 14.5]
Comparison: Microbiological outcome of eradication at EA by baseline pathogen: Klebsiella pneumoniae95% CI: [-6, 38]
Comparison: Microbiological outcome of eradication at EA by baseline pathogen: Klebsiella pneumoniae95% CI: [-8.3, 43.5]
Comparison: Microbiological outcome of eradication at EOT by baseline pathogen: Escherichia coli95% CI: [-0.1, 16.5]
Comparison: Microbiological outcome of eradication at EOT by baseline pathogen: Escherichia coli95% CI: [-3.9, 15.1]
Comparison: Microbiological outcome of eradication at EOT by baseline pathogen: Klebsiella pneumoniae95% CI: [-20.3, 13.9]
Comparison: Microbiological outcome of eradication at EOT by baseline pathogen: Klebsiella pneumoniae95% CI: [-36, 12.6]
Comparison: Microbiological outcome of eradication at TOC by baseline pathogen: Escherichia coli95% CI: [13.5, 37.5]
Comparison: Microbiological outcome of eradication at TOC by baseline pathogen: Escherichia coli95% CI: [-5.5, 23.3]
Comparison: Microbiological outcome of eradication at TOC by baseline pathogen: Klebsiella pneumoniae95% CI: [-3.4, 48.5]
Comparison: Microbiological outcome of eradication at TOC by baseline pathogen: Klebsiella pneumoniae95% CI: [-4.4, 56]
Comparison: Microbiological outcome of eradication at FUP by baseline pathogen: Escherichia coli95% CI: [0.3, 25.9]
Comparison: Microbiological outcome of eradication at FUP by baseline pathogen: Escherichia coli95% CI: [-10.1, 19.3]
Comparison: Microbiological outcome of eradication at FUP by baseline pathogen: Klebsiella pneumoniae95% CI: [-30.4, 22.6]
Comparison: Microbiological outcome of eradication at FUP by baseline pathogen: Klebsiella pneumoniae95% CI: [-34, 31.5]
Secondary

Proportion of Patients With a Microbiological Outcome of Eradication at TOC in Patients With Secondary Bacteremia at Baseline

Patients with isolation of a gram-negative bacteria from at least 1 blood culture at baseline and this isolated pathogen is also identified from the site of infection and signs and symptoms of secondary bacteremia were determined programmatically as secondary bacteremia. Microbiological outcome will be determined programmatically based on blood cultures, with eradication defined as the pathogen found at screening is negative in blood culture.

Time frame: TOC (Test of Cure visit): Day 10 to Day 23 after the start of treatment

Population: Patients with secondary bacteremia at baseline in m-MITT Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cefepime/NacubactamProportion of Patients With a Microbiological Outcome of Eradication at TOC in Patients With Secondary Bacteremia at Baseline12 Participants
Aztreonam/NacubactamProportion of Patients With a Microbiological Outcome of Eradication at TOC in Patients With Secondary Bacteremia at Baseline8 Participants
Imipenem/CilastatinProportion of Patients With a Microbiological Outcome of Eradication at TOC in Patients With Secondary Bacteremia at Baseline6 Participants
95% CI: [-16, 54.3]
95% CI: [-13, 62.1]

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026