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TBTC Study 31: Rifapentine-containing Tuberculosis Treatment Shortening Regimens

Rifapentine-containing Treatment Shortening Regimens for Pulmonary Tuberculosis: A Randomized, Open-label, Controlled Phase 3 Clinical Trial. TBTC Study 31, ACTG Study A5349

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02410772
Acronym
S31/A5349
Enrollment
2516
Registered
2015-04-08
Start date
2016-01-25
Completion date
2021-05-31
Last updated
2024-12-04

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

Conditions

Tuberculosis

Brief summary

The purpose of this study is to determine whether one or two four-month regimens of tuberculosis treatment are as effective as a standard six-month regimen for treatment of pulmonary tuberculosis (TB). All three regimens are administered daily, seven days each week, with direct observation of each dose by a health-care worker at least five of the seven days of each week. The standard six-month regimen is two months of isoniazid, rifampin, ethambutol, and pyrazinamide followed by four months of isoniazid and rifampin. The first short regimen is a single substitution of rifapentine for rifampin: two months of isoniazid, rifapentine, ethambutol, and pyrazinamide, followed by two months of isoniazid and rifapentine. The second short regimen is a double substitution of rifapentine for rifampin and moxifloxacin for ethambutol: two months of isoniazid, rifapentine, moxifloxacin, and pyrazinamide, followed by two months of isoniazid, rifapentine, and moxifloxacin. Target enrollment is 2500 participants. Each study participant will remain in the study for 18 months in order to include at least 12 months of evaluation of whether the participant's TB recurs.

Detailed description

Title: Rifapentine-containing treatment shortening regimens for pulmonary tuberculosis: a randomized, open-label, controlled, phase 3 clinical trial Hypotheses: A) Seventeen (17) week rifapentine-based regimen In previously untreated individuals with active drug-susceptible pulmonary tuberculosis treated with eight weeks of rifapentine (P), isoniazid (H), pyrazinamide (Z) and ethambutol (E) followed by nine weeks of rifapentine plus isoniazid, all given daily throughout, the proportion of participants who experience absence of cure (unfavorable outcome) will not be inferior to that observed in participants who are treated with a standard regimen (eight weeks of rifampin (R), isoniazid, pyrazinamide and ethambutol followed by eighteen weeks of rifampin plus isoniazid), all given daily throughout. B) Seventeen (17) week rifapentine- plus moxifloxacin-containing regimen In previously untreated individuals with active drug-susceptible pulmonary tuberculosis treated with eight weeks of rifapentine, isoniazid, pyrazinamide and moxifloxacin (M), followed by nine weeks of rifapentine, isoniazid, and moxifloxacin, all given daily throughout, the proportion of participants who experience absence of cure (unfavorable outcome) will not be inferior to that observed in participants who are treated with a standard regimen (eight weeks of rifampin, isoniazid, pyrazinamide and ethambutol followed by eighteen weeks of rifampin plus isoniazid), all given daily throughout. Phase: 3 Design: This will be an international, multicenter, randomized, controlled, open-label, 3-arm, phase 3 non-inferiority trial. Population: Patients with newly diagnosed, previously untreated pulmonary tuberculosis. Number of Sites: Multiple international sites, primarily sites of the Tuberculosis Trials Consortium and the AIDS Clinical Trials Group. Study Duration: Duration per participant is approximately 18 months. Description of Agent or Intervention: After written informed consent, participants will be randomly assigned to receive one of the following oral regimens: Regimen 1 (control regimen): 2RHZE/4RH * Eight weeks of daily treatment with rifampin, isoniazid, pyrazinamide, and ethambutol, followed by * Eighteen weeks of daily treatment with rifampin and isoniazid Regimen 2 (investigational regimen): 2PHZE/2PH * Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and ethambutol, followed by * Nine weeks of daily treatment with rifapentine and isoniazid Regimen 3 (investigational regimen): 2PHZM/2PHM * Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and moxifloxacin, followed by * Nine weeks of daily treatment with rifapentine, isoniazid, and moxifloxacin Objectives: Primary: * To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis Secondary: * To evaluate the safety of the investigational regimens * To evaluate the tolerability of the investigational regimens * To collect and store biospecimens from consenting participants for the purpose of future research on discovery and validation of TB biomarkers * To determine the correlation of mycobacterial and clinical markers with time to culture conversion, culture status at completion of eight weeks of treatment, treatment failure, and relapse. * To conduct a pharmacokinetic/pharmacodynamic (PK/PD) study of the test drugs. The main objectives of the PK/PD study are to characterize study drug PK parameters and to determine relationships between treatment outcomes and PK parameters. * To evaluate the pharmacokinetics of efavirenz-based antiretroviral treatment among patients with TB/HIV co-infection taking efavirenz-based combination antiretroviral therapy and TB treatment with rifapentine Endpoints: Primary Endpoints: * Efficacy: TB disease-free survival at twelve months after study treatment assignment. * Safety: Proportion of participants with grade 3 or higher adverse events during study drug treatment Secondary Endpoints: * TB disease-free survival at eighteen months after study treatment assignment * Time to stable sputum culture conversion (solid and liquid media considered separately) * Speed of decline of sputum viable bacilli by automated liquid MGIT culture days to detection * Proportion of participants who are culture negative at completion of eight weeks of treatment (solid and liquid media considered separately) * Sensitivity analyses assuming all participants classified as 'not assessable' have a favorable outcome * Discontinuation of assigned treatment for a reason other than microbiological ineligibility * Estimated steady state efavirenz PK parameters including mid-dosing interval concentration

Interventions

DRUGrifapentine

Regimen 2: Rifapentine is substituted for rifampin as the basis of 4-month treatment

DRUGrifapentine and moxifloxacin

Regimen 3: In addition to the single substitution described for regimen 2, a second substitution is added, of moxifloxacin for ethambutol.

DRUGcontrol

standard six-month treatment

Sponsors

Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
CollaboratorNETWORK
Centers for Disease Control and Prevention
Lead SponsorFED

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Suspected pulmonary tuberculosis plus one or both of the following: a) at least one sputum specimen positive for acid-fast bacilli on smear microscopy OR b) at least one sputum specimen positive for M. tuberculosis by Xpert MTB/RIF testing, with semiquantitative result of 'medium' or 'high' and rifamycin resistance not detected. * Age twelve (12) years or older * A verifiable address or residence location that is readily accessible for visiting, and willingness to inform the study team of any change of address during the treatment and follow-up period. * Women of child-bearing potential who are not surgically sterilized must agree to practice a barrier method of contraception or abstain from heterosexual intercourse during study drug treatment. * Documentation of HIV infection status. * For HIV-positive individuals, CD4 T cell count greater than or equal to 100 cells/mm3 based on testing performed at or within 30 days prior to screening. * Laboratory parameters done at or within 14 days prior to screening: * Serum or plasma alanine aminotransferase (ALT) less than or equal to 3 times the upper limit of normal * Serum or plasma total bilirubin less than or equal to 2.5 times the upper limit of normal * Serum or plasma creatinine level less than or equal to 2 times the upper limit of normal * Serum or plasma potassium level greater than or equal to 3.5 meq/L * Hemoglobin level of 7.0 g/dL or greater * Platelet count of 100,000/mm3 or greater * For women of childbearing potential, a negative pregnancy test at or within seven (7) days prior to screening * Karnofsky score greater than or equal to 60 * Written informed consent

Exclusion criteria

* Pregnant or breast-feeding. * Unable to take oral medications. * Previously enrolled in this study. * Received any investigational drug in the past 3 months. * More than five (5) days of treatment directed against active tuberculosis within 6 months preceding initiation of study drugs. * More than five (5) days of systemic treatment with any one or more of the following drugs within 30 days preceding initiation of study drugs: isoniazid, rifampin, rifabutin, rifapentine, ethambutol, pyrazinamide, kanamycin, amikacin, streptomycin, capreomycin, moxifloxacin, levofloxacin, gatifloxacin, ofloxacin, ciprofloxacin, other fluoroquinolones, ethionamide, prothionamide, cycloserine, terizidone, para-aminosalicylic acid, linezolid, clofazimine, delamanid or bedaquiline. * Known history of prolonged QT syndrome. * Suspected or documented tuberculosis involving the central nervous system and/or bones and/or joints, and/or miliary tuberculosis and/or pericardial tuberculosis. * Current or planned use within six months following enrollment of one or more of the following medications: HIV protease inhibitors, HIV integrase inhibitors, HIV entry and fusion inhibitors, HIV non-nucleoside reverse transcriptase inhibitors other than efavirenz, quinidine, procainamide, amiodarone, sotalol, disopyramide, ziprasidone, or terfenadine. Individuals who are currently taking efavirenz-based antiretroviral treatment or for whom initiation of efavirenz-based antiretroviral treatment is planned within 17 weeks following enrollment may participate. * Weight less than 40.0 kg. * Known allergy or intolerance to any of the study medications. * Individuals will be excluded from enrollment if, at the time of enrollment, their M. tuberculosis isolate is already known to be resistant to any one or more of the following: rifampin, isoniazid, pyrazinamide, ethambutol, or fluoroquinolones. * Other medical conditions, that, in the investigator's judgment, make study participation not in the individual's best interest. * Current or planned incarceration or other involuntary detention.

Design outcomes

Primary

MeasureTime frameDescription
Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Four months and up to 14 days after last does of after study treatment (Regimen 2 and 3) or Six months and up to 14 days after last does of after study treatment (Regimen 1)* To evaluate the Safety of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the Safety of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis Grade 3 or higher Adverse Events are collected by Clinical sites in systematic way through the laboratory tests and physical exam during regular study follow up visits and also in a non-systematic way when it was self-reported by participants during the study visits. The events are graded by site investigators per Common Terminology Criteria for Adverse Events (CTCAE V4.03
TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Twelve months after treatment assignment* To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis A primary outcome status of favorable, unfavorable, or not assessable was assigned. For detailed definitions of outcomes please refer to: Dorman SE, at al. N Engl J Med. 2021 May 6;384(18):1705-1718.
TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Twelve months after treatment assignmentTo evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis A primary outcome status of favorable, unfavorable, or not assessable was assigned. For detailed definitions of outcomes please refer to: Dorman SE, at al. N Engl J Med. 2021 May 6;384(18):1705-1718.

Secondary

MeasureTime frameDescription
Discontinuation of Assigned Treatment for a Reason Other Than Microbiological Ineligibility (Tolerability)four or six monthsTolerability of the regimen is evaluated using the outcome of discontinuation of assigned treatment for a reason other than microbiological ineligibility.
TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentEighteen months after study treatment assignment.* To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis
Speed of Decline of Sputum Viable Bacilli by Automated Liquid MGIT Culture Days to Detection12 monthsParameter estimates of the nonlinear mixed effect models describing longitudinal time to positive (TTP)
Estimated Steady State Efavirenz PK Parameters Including Mid-dosing Interval Concentrationfour monthsAmong participants with HIV infection receiving efavirenz-based antiretroviral therapy, number of participants who maintained plasma efavirenz concentrations ≥1 mg/L during TB treatment.
Proportion of Participants Who Are Culture Negative at Eight Weekseight weeksProportion of participants who are culture negative at eight weeks, liquid media
Time to Stable Sputum Culture Conversionfour or six monthsTime to stable sputum culture conversion, liquid media

Other

MeasureTime frameDescription
Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have an Unfavorable Outcome12 monthsA sensitivity analysis used to supplement the primary efficacy results and provide further insight into whether the intervention regimens should be considered to have non-inferior efficacy. This analysis considers the difference in proportion of unfavorable outcomes between the control arm and each of the experimental arms. Measurement Description: The difference in proportion unfavorable was calculated using a stratified analysis using Cochran-Mantel-Haenszel weights. The analysis was stratified by HIV status and presence of cavitation only, and the stratified difference was considered primary.
Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have a Favorable Outcome12 monthsA sensitivity analysis used to supplement the primary efficacy results and provide further insight into whether the intervention regimens should be considered to have non-inferior efficacy. This analysis considers the difference in proportion of unfavorable outcomes between the control arm and each of the experimental arms. Measurement Description: The difference in proportion unfavorable was calculated using a stratified analysis using Cochran-Mantel-Haenszel weights. The analysis was stratified by HIV status and presence of cavitation only, and the stratified difference was considered primary.

Countries

Brazil, China, Haiti, India, Kenya, Malawi, Peru, South Africa, Thailand, Uganda, United States, Vietnam, Zimbabwe

Participant flow

Recruitment details

Participants were enrolled at 34 clinical research sites in 13 countries between January 2016 and October 2018. First participant was enrolled on 25 January 2016. Last participant was enrolled on 30 October 2018.

Pre-assignment details

Of 5214 participants screened, 2049 did not meet the eligible criteria, 405 declined to participate and site decided not to enroll 145 participants. 2516 participants were randomized Participants were required to have at least one sputum specimen positive for acid-fast bacilli by smear microscopy or positive for M. tuberculosis by Xpert MTB/RIF testing with semiquantitative result of medium or highand susceptible to isoniazid, rifampin, and fluoroquinolones

Participants by arm

ArmCount
Regimen 1 (2HRZE/4HR)
Eight weeks of daily treatment with rifampin, isoniazid, pyrazinamide, and ethambutol, followed by Eighteen weeks of daily treatment with rifampin and isoniazid All drugs are administered orally, seven days/week, directly observed by a health care worker at least five of the seven days each week. Pyridoxine (vitamin B6), 25 or 50 mg, is administered with each study dose. Study drug doses: rifampin, 600 mg; isoniazid, 300 mg; pyrazinamide, \< 55kg 1000 mg, \>= 55-75 kg 1500 mg, \>75 kg 2000 mg; ethambutol, \< 55kg 800 mg, \>= 55-75 kg 1200 mg, \>75 kg 1600 mg study drug doses: rifampin, 600 mg; isoniazid, 300 mg; pyrazinamide, \< 55kg 1000 mg, \>= 55-75 kg 1500 mg, \>75 kg 2000 mg; ethambutol, \< 55kg 800 mg, \>= 55-75 kg 1200 mg, \>75 kg 1600 mg control: standard six-month treatment
768
Regimen 2 (2HPZ/2HP)
Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and ethambutol, followed by Nine weeks of daily treatment with rifapentine and isoniazid All drugs are administered orally, seven days/week, directly observed by a health care worker at least five of the seven days each week. Pyridoxine (vitamin B6), 25 or 50 mg, is administered with each study dose. Study drug doses: rifapentine 1200 mg; isoniazid, 300 mg; pyrazinamide, \< 55kg 1000 mg, \>= 55-75 kg 1500 mg, \>75 kg 2000 mg; ethambutol, \< 55kg 800 mg, \>= 55-75 kg 1200 mg, \>75 kg 1600 mg study drug doses: rifapentine 1200 mg; isoniazid, 300 mg; pyrazinamide, \< 55kg 1000 mg, \>= 55-75 kg 1500 mg, \>75 kg 2000 mg; ethambutol, \< 55kg 800 mg, \>= 55-75 kg 1200 mg, \>75 kg 1600 mg rifapentine: Regimen 2: Rifapentine is substituted for rifampin as the basis of 4-month treatment
784
Regimen 3 (2HPMZ/2HPM)
Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and moxifloxacin, followed by Nine weeks of daily treatment with rifapentine, isoniazid, and moxifloxacin All drugs are administered orally, seven days/week, directly observed by a health care worker at least five of the seven days each week. Pyridoxine (vitamin B6), 25 or 50 mg, is administered with each study dose. Study drug doses: rifapentine 1200 mg; isoniazid, 300 mg; pyrazinamide, \< 55kg 1000 mg, \>= 55-75 kg 1500 mg, \>75 kg 2000 mg; ethambutol, \< 55kg 800 mg, \>= 55-75 kg 1200 mg, \>75 kg 1600 mg study drug doses: rifapentine 1200 mg; isoniazid, 300 mg; pyrazinamide, \< 55kg 1000 mg, \>= 55-75 kg 1500 mg, \>75 kg 2000 mg; moxifloxacin, 400 mg rifapentine and moxifloxacin: Regimen 3: In addition to the single substitution described for regimen 2, a second substitution is added, of moxifloxacin for ethambutol.
791
Total2,343

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyBaseline Drug Resistance494051
Overall StudyDeath348
Overall StudyLost to Follow-up312322
Overall StudyNo positive Mycobacterium tuberculosis culture463
Overall StudyPregnancy845
Overall StudyProtocol Violation884
Overall StudyReinfection with a new strain of MTB010

Baseline characteristics

CharacteristicRegimen 1 (2HRZE/4HR)TotalRegimen 3 (2HPMZ/2HPM)Regimen 2 (2HPZ/2HP)
Age, Categorical
<=18 years
19 Participants63 Participants25 Participants19 Participants
Age, Categorical
>=65 years
6 Participants27 Participants11 Participants10 Participants
Age, Categorical
Between 18 and 65 years
743 Participants2253 Participants755 Participants755 Participants
Age, Continuous30.9 years31.0 years31.0 years31.0 years
Cavitation status at Baseline
Cavitation on chest radiograph
558 Participants1703 Participants572 Participants573 Participants
Cavitation status at Baseline
No cavitation on chest radiograph
204 Participants619 Participants210 Participants205 Participants
Cavitation status at Baseline
Unknown
6 Participants21 Participants9 Participants6 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
27 Participants74 Participants27 Participants20 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
287 Participants867 Participants297 Participants283 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
454 Participants1402 Participants467 Participants481 Participants
HIV Status
HIV Negative
704 Participants2149 Participants729 Participants716 Participants
HIV Status
HIV Positive
64 Participants194 Participants62 Participants68 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
86 Participants268 Participants89 Participants93 Participants
Race (NIH/OMB)
Black or African American
553 Participants1676 Participants552 Participants571 Participants
Race (NIH/OMB)
More than one race
111 Participants357 Participants135 Participants111 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
3 Participants6 Participants2 Participants1 Participants
Race (NIH/OMB)
White
15 Participants36 Participants13 Participants8 Participants
Region of Enrollment
Africa
565 Participants1716 Participants578 Participants573 Participants
Region of Enrollment
South America
109 Participants339 Participants115 Participants115 Participants
Region of Enrollment
South Asia
86 Participants263 Participants88 Participants89 Participants
Region of Enrollment
United States
8 Participants25 Participants10 Participants7 Participants
Sex: Female, Male
Female
224 Participants673 Participants228 Participants221 Participants
Sex: Female, Male
Male
544 Participants1670 Participants563 Participants563 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
12 / 82511 / 83513 / 846
other
Total, other adverse events
74 / 82561 / 83594 / 846
serious
Total, serious adverse events
56 / 82539 / 83537 / 846

Outcome results

Primary

Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)

* To evaluate the Safety of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the Safety of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis Grade 3 or higher Adverse Events are collected by Clinical sites in systematic way through the laboratory tests and physical exam during regular study follow up visits and also in a non-systematic way when it was self-reported by participants during the study visits. The events are graded by site investigators per Common Terminology Criteria for Adverse Events (CTCAE V4.03

Time frame: Four months and up to 14 days after last does of after study treatment (Regimen 2 and 3) or Six months and up to 14 days after last does of after study treatment (Regimen 1)

Population: Safety analyses included all randomized participants who received at least one dose of study treatment

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Participants with Grade 3 or higher Adverse events159 Participants
Regimen 1 (2HRZE/4HR)Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Participants with less than Grade 3 Adverse Events or no adverse events666 Participants
Regimen 2 (2HPZ/2HP)Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Participants with Grade 3 or higher Adverse events119 Participants
Regimen 2 (2HPZ/2HP)Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Participants with less than Grade 3 Adverse Events or no adverse events716 Participants
Regimen 3 (2HPMZ/2HPM)Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Participants with Grade 3 or higher Adverse events159 Participants
Regimen 3 (2HPMZ/2HPM)Percentage Participants With Grade 3 or Higher Adverse Events During Study Drug Treatment in Control Regimen (Regimen 1 2HRZE/4HR) Compared to Experimental Regimens, Regimen 3 (2HPZM/2HPM) and Regimen 2 (2HPZ/2HP) (Safety Analysis Population)Participants with less than Grade 3 Adverse Events or no adverse events687 Participants
Comparison: For primary Safety endpoint, unfavorable outcomes for Arm1(control) vs Arm3(2PHZM/2PHM) will be considered first, if non-inferiority criteria are met, then Arm 1 vs Arm 2(2PHZE/2PH) will be compared. The proportion of participants with unfavorable outcome can be estimated as: if r\_a and r\_b are the proportions of unfavorable outcome for the two study arms (a=Arm1 and b = Arm2 or Arm3) and if δ is the non-inferiority margin (=6.6%), statistical hypothesis is H\_0:r\_b-r\_a≥δ vs.H\_1:r\_b-r\_a\<δp-value: 0.0595% CI: [-4.3, 3.2]Cochran-Mantel-Haenszel
Comparison: For primary Safety endpoint, unfavorable outcomes for Arm1(control) vs Arm3(2PHZM/2PHM) will be considered first, if non-inferiority criteria are met, then Arm 1 vs Arm 2(2PHZE/2PH) will be compared. The proportion of participants with unfavorable outcome can be estimated as: if r\_a and r\_b are the proportions of unfavorable outcome for the two study arms (a=Arm1 and b = Arm2 or Arm3) and if δ is the non-inferiority margin (=6.6%), statistical hypothesis is H\_0:r\_b-r\_a≥δ vs.H\_1:r\_b-r\_a\<δp-value: 0.0595% CI: [-8.7, -1.5]Cochran-Mantel-Haenszel
Primary

TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)

* To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis A primary outcome status of favorable, unfavorable, or not assessable was assigned. For detailed definitions of outcomes please refer to: Dorman SE, at al. N Engl J Med. 2021 May 6;384(18):1705-1718.

Time frame: Twelve months after treatment assignment

Population: Excluded Microbiologically eligible participants without an assessable outcomes, if they were not already classified as unfavorable and also did not attend 12M visit but were culture negative when last seen, or had treatment changed due to pregnancy, or died during follow-up with cause unrelated to tuberculosis, or received additional treatment for tuberculosis following exogenous reinfection demonstrated by whole genome sequencing, or died from a violent or accidental death during treatment

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Favorable656 Participants
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Unfavorable70 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Favorable645 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Unfavorable107 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Favorable668 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Assessable Population)Unfavorable88 Participants
Comparison: For primary efficacy endpoint, unfavorable outcomes for Arm1(control) vs Arm3(2PHZM/2PHM) will be considered first, if non-inferiority criteria are met, then Arm 1 vs Arm 2(2PHZE/2PH) will be compared. The proportion of participants with unfavorable outcome can be estimated as: if r\_a and r\_b are the proportions of unfavorable outcome for the two study arms (a=Arm1 and b = Arm2 or Arm3) and if δ is the non-inferiority margin (=6.6%), statistical hypothesis is H\_0:r\_b-r\_a≥δ vs.H\_1:r\_b-r\_a\<δp-value: 0.0595% CI: [-1.1, 5.1]Cochran-Mantel-Haenszel
Comparison: For primary efficacy endpoint, unfavorable outcomes for Arm1(control) vs Arm3(2PHZM/2PHM) will be considered first, if non-inferiority criteria are met, then Arm 1 vs Arm 2(2PHZE/2PH) will be compared. The proportion of participants with unfavorable outcome can be estimated as: if r\_a and r\_b are the proportions of unfavorable outcome for the two study arms (a=Arm1 and b = Arm2 or Arm3) and if δ is the non-inferiority margin (=6.6%), statistical hypothesis is H\_0:r\_b-r\_a≥δ vs.H\_1:r\_b-r\_a\<δp-value: 0.0595% CI: [1.2, 7.7]Cochran-Mantel-Haenszel
Primary

TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)

To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis A primary outcome status of favorable, unfavorable, or not assessable was assigned. For detailed definitions of outcomes please refer to: Dorman SE, at al. N Engl J Med. 2021 May 6;384(18):1705-1718.

Time frame: Twelve months after treatment assignment

Population: The population is the Microbiologically eligible population that included the randomized participants excluding the ones with no evidence of cultures positive for M. tuberculosis, or with resistance to one or more of isoniazid, rifampin or fluoroquinolones, or are enrolled in violation of eligibility criteria

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Favorable Outcome656 Participants
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Unfavorable Outcome112 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Favorable Outcome645 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Unfavorable Outcome139 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Favorable Outcome668 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at 12M After Study Treatment Assignment Among Participants in Control Regimen, Regimen1 (2HRZE/4HR) to Experimental Regimens, Regimen3 (2HPZM/2HPM) and Regimen2 (2HPZ/2HP) (Modified Intent to Treat [MITT] Population)Unfavorable Outcome123 Participants
Comparison: For primary efficacy endpoint, unfavorable outcomes for Arm1(control) vs Arm3(2PHZM/2PHM) will be considered first, if non-inferiority criteria are met, then Arm 1 vs Arm 2(2PHZE/2PH) will be compared. The proportion of participants with unfavorable outcome can be estimated as: if r\_a and r\_b are the proportions of unfavorable outcome for the two study arms (a=Arm1 and b = Arm2 or Arm3) and if δ is the non-inferiority margin (=6.6%), statistical hypothesis is H\_0:r\_b-r\_a≥δ vs.H\_1:r\_b-r\_a\<δp-value: 0.0595% CI: [-2.6, 4.5]Cochran-Mantel-Haenszel
Comparison: For primary efficacy endpoint, unfavorable outcomes for Arm1(control) vs Arm3(2PHZM/2PHM) will be considered first, if non-inferiority criteria are met, then Arm 1 vs Arm 2(2PHZE/2PH) will be compared. The proportion of participants with unfavorable outcome can be estimated as: if r\_a and r\_b are the proportions of unfavorable outcome for the two study arms (a=Arm1 and b = Arm2 or Arm3) and if δ is the non-inferiority margin (=6.6%), statistical hypothesis is H\_0:r\_b-r\_a≥δ vs.H\_1:r\_b-r\_a\<δp-value: 0.0595% CI: [-0.6, 6.6]Cochran-Mantel-Haenszel
Secondary

Discontinuation of Assigned Treatment for a Reason Other Than Microbiological Ineligibility (Tolerability)

Tolerability of the regimen is evaluated using the outcome of discontinuation of assigned treatment for a reason other than microbiological ineligibility.

Time frame: four or six months

Population: Safety population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)Discontinuation of Assigned Treatment for a Reason Other Than Microbiological Ineligibility (Tolerability)61 Participants
Regimen 2 (2HPZ/2HP)Discontinuation of Assigned Treatment for a Reason Other Than Microbiological Ineligibility (Tolerability)37 Participants
Regimen 3 (2HPMZ/2HPM)Discontinuation of Assigned Treatment for a Reason Other Than Microbiological Ineligibility (Tolerability)55 Participants
Secondary

Estimated Steady State Efavirenz PK Parameters Including Mid-dosing Interval Concentration

Among participants with HIV infection receiving efavirenz-based antiretroviral therapy, number of participants who maintained plasma efavirenz concentrations ≥1 mg/L during TB treatment.

Time frame: four months

Population: Analysis Population Description: This analysis population includes participants in EFV group 1 who were already on an EFV-containing ART regimen when initiating RPT-based TB treatment (experimental arms only). That is, this analysis was pre-specified to report data by pooling participants from Regimen 2 (2HPZE/2HP) and Regimen 3 (2HPMZ/2HPM) who were on an EFV-containing ART regimen.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)Estimated Steady State Efavirenz PK Parameters Including Mid-dosing Interval Concentration62 Participants
Secondary

Proportion of Participants Who Are Culture Negative at Eight Weeks

Proportion of participants who are culture negative at eight weeks, liquid media

Time frame: eight weeks

Population: Microbiologically eligible analysis population, evaluable patients (positive or negative culture result)

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)Proportion of Participants Who Are Culture Negative at Eight Weeks523 Participants
Regimen 2 (2HPZ/2HP)Proportion of Participants Who Are Culture Negative at Eight Weeks616 Participants
Regimen 3 (2HPMZ/2HPM)Proportion of Participants Who Are Culture Negative at Eight Weeks641 Participants
Secondary

Speed of Decline of Sputum Viable Bacilli by Automated Liquid MGIT Culture Days to Detection

Parameter estimates of the nonlinear mixed effect models describing longitudinal time to positive (TTP)

Time frame: 12 months

Population: The population is the Microbiologically eligible population that included the randomized participants excluding the ones with no evidence of cultures positive for M. tuberculosis, or with resistance to one or more of isoniazid, rifampin or fluoroquinolones, or are enrolled in violation of eligibility criteria.

ArmMeasureValue (NUMBER)
Regimen 1 (2HRZE/4HR)Speed of Decline of Sputum Viable Bacilli by Automated Liquid MGIT Culture Days to Detection0.14 log10 DTP / day
Regimen 2 (2HPZ/2HP)Speed of Decline of Sputum Viable Bacilli by Automated Liquid MGIT Culture Days to Detection0.20 log10 DTP / day
Regimen 3 (2HPMZ/2HPM)Speed of Decline of Sputum Viable Bacilli by Automated Liquid MGIT Culture Days to Detection0.24 log10 DTP / day
Secondary

TB Disease-free Survival at Eighteen Months After Study Treatment Assignment

* To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis

Time frame: Eighteen months after treatment assignment

Population: Assessable Population: Excluded the Microbiologically eligible pts without an assessable outcomes as if they were not already classified as unfavorable and add did not attend mo12 visit but were culture negative when last seen, or had treatment changed due to pregnancy, or died during follow-up with cause unrelated to tuberculosis, or received additional treatment for tuberculosis following exogenous reinfection demonstrated by WGS, or died from a violent or accidental death during treatment

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentFavorable656 Participants
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentUnfavorable69 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentFavorable636 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentUnfavorable97 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentFavorable667 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentUnfavorable79 Participants
95% CI: [-2.01, 4.11]
95% CI: [0.42, 6.9]
Secondary

TB Disease-free Survival at Eighteen Months After Study Treatment Assignment

* To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis * To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase, to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis

Time frame: Eighteen months after study treatment assignment.

Population: The population is the Microbiologically eligible population that included the randomized participants excluding the ones with no evidence of cultures positive for M. tuberculosis, or with resistance to one or more of isoniazid, rifampin or fluoroquinolones, or are enrolled in violation of eligibility criteria

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentFavorable656 Participants
Regimen 1 (2HRZE/4HR)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentUnfavorable112 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentFavorable636 Participants
Regimen 2 (2HPZ/2HP)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentUnfavorable148 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentFavorable667 Participants
Regimen 3 (2HPMZ/2HPM)TB Disease-free Survival at Eighteen Months After Study Treatment AssignmentUnfavorable124 Participants
95% CI: [-2.45, 4.63]
95% CI: [0.45, 7.79]
Secondary

Time to Stable Sputum Culture Conversion

Time to stable sputum culture conversion, liquid media

Time frame: four or six months

Population: Microbiologically Eligible Analysis Population

ArmMeasureValue (MEDIAN)
Regimen 1 (2HRZE/4HR)Time to Stable Sputum Culture Conversion8.14 weeks
Regimen 2 (2HPZ/2HP)Time to Stable Sputum Culture Conversion8.14 weeks
Regimen 3 (2HPMZ/2HPM)Time to Stable Sputum Culture Conversion8.14 weeks
Other Pre-specified

Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have a Favorable Outcome

A sensitivity analysis used to supplement the primary efficacy results and provide further insight into whether the intervention regimens should be considered to have non-inferior efficacy. This analysis considers the difference in proportion of unfavorable outcomes between the control arm and each of the experimental arms. Measurement Description: The difference in proportion unfavorable was calculated using a stratified analysis using Cochran-Mantel-Haenszel weights. The analysis was stratified by HIV status and presence of cavitation only, and the stratified difference was considered primary.

Time frame: 12 months

Population: Assessable analysis population.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have a Favorable Outcome671 Participants
Regimen 2 (2HPZ/2HP)Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have a Favorable Outcome650 Participants
Regimen 3 (2HPMZ/2HPM)Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have a Favorable Outcome673 Participants
95% CI: [2.8, 8.9]
95% CI: [0.5, 6.3]
Other Pre-specified

Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have an Unfavorable Outcome

A sensitivity analysis used to supplement the primary efficacy results and provide further insight into whether the intervention regimens should be considered to have non-inferior efficacy. This analysis considers the difference in proportion of unfavorable outcomes between the control arm and each of the experimental arms. Measurement Description: The difference in proportion unfavorable was calculated using a stratified analysis using Cochran-Mantel-Haenszel weights. The analysis was stratified by HIV status and presence of cavitation only, and the stratified difference was considered primary.

Time frame: 12 months

Population: Microbiologically eligible analysis population.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Regimen 1 (2HRZE/4HR)Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have an Unfavorable Outcome656 Participants
Regimen 2 (2HPZ/2HP)Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have an Unfavorable Outcome645 Participants
Regimen 3 (2HPMZ/2HPM)Sensitivity Analyses Assuming All Losses to Follow-up and Non-tuberculosis Deaths Have an Unfavorable Outcome668 Participants
95% CI: [-0.6, 6.6]
95% CI: [-1.12, 5.7]

Source: ClinicalTrials.gov · Data processed: Mar 5, 2026