Dosing schedules of 6-month regimens and relapse for pulmonary tuberculosis
Dosing schedules of 6-month regimens and relapse for pulmonary tuberculosis
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DOI:
10.1164/rccm.200605-637oc
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发表时间:
2006-11-15
影响因子:
24.7
通讯作者:
Tam, Cheuk M.
中科院分区:
文献类型:
--
作者:
Chang, Kwok C.;Leung, Chi C.;Tam, Cheuk M.
Rationale: The optimal approach for reducing tuberculosis relapse is open.Objectives: We examined the possibility of reducing relapse by increasing dosing schedules.Methods: We conducted a systematic review of published clinical trials involving adult cohorts with pulmonary tuberculosis treated using 6-mo rifamycin-containing regimens, which were grouped under seven categories ordered by dosing schedules. Assuming cavitation and positive 2-mo culture were the driving forces for relapse, a static deterministic model apportioned observed numbers with and without relapse in each cohort into eight subgroups. Combining subgroups stratified by cavitation, 2-mo culture, and regimens enabled estimation of adjusted relapse risks. chi(2) Tests for trend and logistic regression analysis examined the relationship between relapse and dosing schedules.Results: We identified 200 cases of bacteriologic relapse out of 5,208 patients in 32 cohorts. A logistic risk model showed a significant dose-response relationship between dosing schedules and relapse, with the following odds (95% confidence intervals) of relapse relative to daily regimens: 1.6 (0.6-4.1) for daily initial phase (113) plus thrice-weekly continuation phase (CP), 2.8 (1.3-6.1) for daily IP plus twice-weekly CP, 2.8 (1.4-5.7) for thrice-weekly, 5.0 (2.4-10.5) for daily IP plus once-weekly rifapentine, and 7.1 (3.3-15.3) for thrice-weekly IP plus once-weekly rifapentine. In the presence of cavitation, only 6-mo daily or daily IP plus thrice-weekly CP attained best-estimated relapse risks below 5%; they reached 6% when 2-mo culture was also positive.Conclusions: Cavitary tuberculosis is best treated with 6-mo regimens comprising daily IP and thrice-weekly CP, which may be extended when 2-mo culture is positive.