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Randomized Trial of Culture Directed Versus Empiric Antibiotics for Urinary Tract Infections in Older Women

A Randomized Pilot and Feasibility Study of a cultuRE-Directed Approach to Urinary traCT Infection Symptoms in Older womeN: a Mixed Methods Evaluation - the REDUCTION Trial

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05726318
Acronym
REDUCTION
Enrollment
70
Registered
2023-02-13
Start date
2023-02-17
Completion date
2024-08-02
Last updated
2025-08-27

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

Conditions

UTI

Brief summary

To evaluate the feasibility of recruiting eligible subjects into a randomized trial of a culture-directed versus empiric antibiotic strategy for patient-reported urinary tract infection symptoms in older women and the adherence to study procedures.

Detailed description

To evaluate A) the feasibility of recruiting eligible subjects into a randomized trial of a culture-directed versus empiric antibiotic strategy for patient-reported urinary tract infection (UTI) symptoms in older women and B) the adherence to study procedures. We will recruit and enroll women with a history of recurrent UTI (rUTI) from the Women's Center for Bladder and Pelvic Health and the University of Pittsburgh's Clinical and Translational Science Institute (CTSI) Pitt+Me® Research Registry. Once enrolled and randomized, women will be followed for a total of 28 days to document both clinical resolution at day 7 from symptom onset and adverse events. H1) Enrolling a total of 70 subjects in \<1 year (at least 10% of eligible patients) will demonstrate feasibility of recruitment and H2) Documenting at least 70% patient compliance with study procedures will confirm patient adherence to study protocol. Exploratory Aim: To explore the safety of a culture-directed UTI treatment strategy and preliminary secondary outcomes of assigned treatments. H1) There will be an overall low number of adverse events and H2) Preliminary outcome data will help power future trial.

Interventions

DRUGAntibiotics

Participants will be provided either nitrofurantoin 100 mg oral twice a day for 5 days, trimethoprim/sulfamethoxazole 875/125 oral twice a day for 3 days, fosfomycin 3g once oral, ciprofloxacin 250 mg oral twice a day for 5 days or cephalexin 500 mg oral twice a day for 5 days

Sponsors

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
CollaboratorNIH
Megan Bradley
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
65 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Female biologic Sex * Age ≥65 years old * History of recurrent UTI per patient report of greater than 2 UTIs in the last 6 months or 3 UTIs in the last year * Patient reported UTI defined as: * Dysuria, increased urinary urgency/frequency and/or suprapubic pain

Exclusion criteria

* Male biologic sex * Age \<65 years old * History of augmentation cystoplasty or cystectomy * Currently performing clean intermittent self-catheterization * Current indwelling foley catheter * Urinary tract instrumentation (i.e., cystourethroscopy, foley catheter placement) in the last 30 days * Undergoing treatment for malignancy * History of either confirmed or patient reported pyelonephritis and/or urosepsis * Cirrhosis and/or end stage liver disease * Chronic kidney disease with most recent estimated glomerular filtration rate \<50 ml/min * Dementia and/or currently reside in skilled nursing facility * Current high-dose chronic steroids (\>20mg/day of prednisone) * Previous solid organ transplant * Provider concern for pyelonephritis and/or sepsis (i.e., fevers) * Unwilling or unable to comply with study procedures

Design outcomes

Primary

MeasureTime frameDescription
Eligible Subjects That Were Enrolled in the StudyThrough study completion, an average of 17.5 monthsNumber and proportion of eligible subjects that were enrolled in the study

Secondary

MeasureTime frameDescription
Number of Persons That Were Screened for ParticipationThrough study completion, an average of 17.5 monthsOverall number of persons that were screened for participation
Proportion of Persons Screened Who Met Inclusion/Exclusion Criteria30 daysNumber of person screened who met include/exclusion criteria divided by number participants screened
Proportion of Persons Screened Who Declined Participation or Were Ineligible30 daysNumber of person screened who declined or were ineligible divided by number participants screened
Proportion of Participants Enrolled Who Completed the Study30 daysNumber of persons enrolled who completed the study (at least one follow-up questionnaire and completed the day 28 questionnaire) divided by number participants enrolled
Proportion of Enrolled Participants That Completed All Study Procedures30 daysNumber of persons enrolled who completed all study procedures (completed all 4 follow-up questionnaires) divided by number participants enrolled
Proportion of Enrolled Participants That Took Alternative Agents for Management of Symptoms30 daysNumber of persons enrolled who took alternative agents for management of symptoms divided by number participants enrolled
Proportion of Participants in the Culture-directed Arm That Acquired Off-protocol Antibiotics for Their Symptoms30 daysNumber of participants in the culture-directed arm that acquired off-protocol antibiotics for their symptoms divided by the number of participants in the culture-directed arm
Proportion of Enrolled Participants That Completed Electronic Surveys30 daysNumber of persons enrolled who completed all electronic surveys divided by number participants enrolled
Monthly Enrollment RateThrough study completion, an average of 17.5 monthsnumber of participants that were enrolled each month

Other

MeasureTime frameDescription
Clinical Success at 14 Days14 daysScore of \<1 on question 1 (urinary burning),3 (urinary urgency) and 5 (urinary frequency) on Urinary Tract Infection Symptom Assessment at day 14. A lower scale correlates with better symptoms with 0 being no symptoms and 1 being little symptoms.

Countries

United States

Participant flow

Participants by arm

ArmCount
Culture-directed Antibiotic
Participants will be directed to refrain from taking antibiotics until results of urine culture are reported, which is expected within 48-72h. Antibiotics: Participants will be provided either nitrofurantoin 100 mg oral twice a day for 5 days, trimethoprim/sulfamethoxazole 875/125 oral twice a day for 3 days, fosfomycin 3g once oral, ciprofloxacin 250 mg oral twice a day for 5 days or cephalexin 500 mg oral twice a day for 5 days
35
Empiric Antibiotic
Antibiotic Protocol. For participants in the empiric Rx arm, we will choose an antibiotic with consideration of patient reported allergies, current medications and current IDSA guidelines. If there is a contraindication to the first antibiotic on the list they will progress to the next option until a suitable selection is achieved. Antibiotics: Participants will be provided either nitrofurantoin 100 mg oral twice a day for 5 days, trimethoprim/sulfamethoxazole 875/125 oral twice a day for 3 days, fosfomycin 3g once oral, ciprofloxacin 250 mg oral twice a day for 5 days or cephalexin 500 mg oral twice a day for 5 days
35
Total70

Baseline characteristics

CharacteristicEmpiric AntibioticTotalCulture-directed Antibiotic
Age, Continuous75.7 years
STANDARD_DEVIATION 6.8
74.9 years
STANDARD_DEVIATION 6.9
74.1 years
STANDARD_DEVIATION 7.1
BMI28.5 kg/m^2
STANDARD_DEVIATION 6.1
29.5 kg/m^2
STANDARD_DEVIATION 6.9
30.5 kg/m^2
STANDARD_DEVIATION 7.6
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants1 Participants0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
34 Participants69 Participants35 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Number of Participants with Diabetes Mellitus6 Participants11 Participants5 Participants
Pelvic Floor Distress Inventory-20146.0 units on a scale
STANDARD_DEVIATION 68
142.0 units on a scale
STANDARD_DEVIATION 63.7
137.9 units on a scale
STANDARD_DEVIATION 59.9
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants1 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
34 Participants69 Participants35 Participants
Sex: Female, Male
Female
35 Participants70 Participants35 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 350 / 35
other
Total, other adverse events
5 / 350 / 35
serious
Total, serious adverse events
0 / 350 / 35

Outcome results

Primary

Eligible Subjects That Were Enrolled in the Study

Number and proportion of eligible subjects that were enrolled in the study

Time frame: Through study completion, an average of 17.5 months

Population: There were 103 eligible participants in the study time frame

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyEligible Subjects That Were Enrolled in the Study70 Participants
Secondary

Monthly Enrollment Rate

number of participants that were enrolled each month

Time frame: Through study completion, an average of 17.5 months

Population: How many of the total 70 participants we enrolled per month

ArmMeasureValue (MEDIAN)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyMonthly Enrollment Rate4 participants enrolled per month
Secondary

Number of Persons That Were Screened for Participation

Overall number of persons that were screened for participation

Time frame: Through study completion, an average of 17.5 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyNumber of Persons That Were Screened for Participation131 Participants
Secondary

Proportion of Enrolled Participants That Completed All Study Procedures

Number of persons enrolled who completed all study procedures (completed all 4 follow-up questionnaires) divided by number participants enrolled

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Enrolled Participants That Completed All Study Procedures30 Participants
Empiric AntibioticProportion of Enrolled Participants That Completed All Study Procedures31 Participants
p-value: 0.78Chi-squared
Secondary

Proportion of Enrolled Participants That Completed Electronic Surveys

Number of persons enrolled who completed all electronic surveys divided by number participants enrolled

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Enrolled Participants That Completed Electronic Surveys30 Participants
Empiric AntibioticProportion of Enrolled Participants That Completed Electronic Surveys31 Participants
p-value: 0.78Chi-squared
Secondary

Proportion of Enrolled Participants That Took Alternative Agents for Management of Symptoms

Number of persons enrolled who took alternative agents for management of symptoms divided by number participants enrolled

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Enrolled Participants That Took Alternative Agents for Management of Symptoms16 Participants
Empiric AntibioticProportion of Enrolled Participants That Took Alternative Agents for Management of Symptoms10 Participants
p-value: 0.68Chi-squared
Secondary

Proportion of Participants Enrolled Who Completed the Study

Number of persons enrolled who completed the study (at least one follow-up questionnaire and completed the day 28 questionnaire) divided by number participants enrolled

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Participants Enrolled Who Completed the Study30 Participants
Empiric AntibioticProportion of Participants Enrolled Who Completed the Study31 Participants
p-value: 0.78Chi-squared
Secondary

Proportion of Participants in the Culture-directed Arm That Acquired Off-protocol Antibiotics for Their Symptoms

Number of participants in the culture-directed arm that acquired off-protocol antibiotics for their symptoms divided by the number of participants in the culture-directed arm

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Participants in the Culture-directed Arm That Acquired Off-protocol Antibiotics for Their Symptoms1 Participants
Secondary

Proportion of Persons Screened Who Declined Participation or Were Ineligible

Number of person screened who declined or were ineligible divided by number participants screened

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Persons Screened Who Declined Participation or Were Ineligible43 Participants
Secondary

Proportion of Persons Screened Who Met Inclusion/Exclusion Criteria

Number of person screened who met include/exclusion criteria divided by number participants screened

Time frame: 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyProportion of Persons Screened Who Met Inclusion/Exclusion Criteria103 Participants
Other Pre-specified

Clinical Success at 14 Days

Score of \<1 on question 1 (urinary burning),3 (urinary urgency) and 5 (urinary frequency) on Urinary Tract Infection Symptom Assessment at day 14. A lower scale correlates with better symptoms with 0 being no symptoms and 1 being little symptoms.

Time frame: 14 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Overall Number and Proportion of Eligible Subjects That Were Enrolled in the StudyClinical Success at 14 Days19 Participants
Empiric AntibioticClinical Success at 14 Days12 Participants
p-value: 0.13Chi-squared

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