Evaluation of treatment outcomes and associated factors among patients managed for tuberculosis in Vihiga County, 2012‐ 2015

Abstract

Background: Tuberculosis (TB) treatment outcomes are used to evaluate program and patient success. Despite this, factors driving and sustaining high rates of poor TB treatment outcomes in Vihiga County are not well understood.

Objective: To evaluate treatment outcomes and associated factors among patients managed for TB in Vihiga County between 2012 and 2015.

Design: Descriptive cohort study.

Setting: Vihiga County.

Subjects: Notified TB patients >15years who were on drug susceptible TB treatment.

Results: Of the 3288 eligible patients more than half were male 1961 (60%), 85% were from the public sector while 23% were over 45years. Among the TB patients, 2865 (87%) were successfully treated, 299 (9%) died and 124 (4%) had other poor treatment outcomes. On multivariate analysis, advancing age (Adjusted Odds Ratio (AOR) 3.3, 95% CI2.03‐5.38, P<0.001), HIV positive (AOR1.78, 95% CI1.27‐2.49, P0.001), previously treated (AOR1.78, 95% CI1.2‐2.49, P<0.001) and unknown HIV status (AOR 2.11, 95% CI 1.21‐3.68, P 0.008) increased the risk of death. TB patients with positive sputum results during initiation of treatment (AOR=0.68, CI=0.50‐0.94, P‐value 0.018) and those with normal body mass index (BMI) (AOR 0.37, 95% CI 0.24‐0.58, P<0.001), were less likely to die.

Conclusion: While higher BMI and bacteriological confirmation reduced the risk of death, advancing age, unknown HIV status, HIV positive, being a previously treated TB case increased the risk of death. We recommend early and accurate diagnosis of TB cases, TB/HIV integration and active involvement of community health volunteers in TB management.