1. Gender differences in tuberculosis treatment outcomes: a post hoc analysis of the REMoxTB study.
- Author
-
Murphy, ME, Wills, GH, Murthy, S, Louw, C, Bateson, ALC, Hunt, RD, McHugh, TD, Nunn, AJ, Meredith, SK, Mendel, CM, Spigelman, M, Crook, AM, Gillespie, SH, REMoxTB consortium, Murphy, ME, Wills, GH, Murthy, S, Louw, C, Bateson, ALC, Hunt, RD, McHugh, TD, Nunn, AJ, Meredith, SK, Mendel, CM, Spigelman, M, Crook, AM, Gillespie, SH, and REMoxTB consortium
- Abstract
BACKGROUND: In the REMoxTB study of 4-month treatment-shortening regimens containing moxifloxacin compared to the standard 6-month regimen for tuberculosis, the proportion of unfavourable outcomes for women was similar in all study arms, but men had more frequent unfavourable outcomes (bacteriologically or clinically defined failure or relapse within 18 months after randomisation) on the shortened moxifloxacin-containing regimens. The reason for this gender disparity in treatment outcome is poorly understood. METHODS: The gender differences in baseline variables were calculated, as was time to smear and culture conversion and Kaplan-Meier plots were constructed. In post hoc exploratory analyses, multivariable logistic regression modelling and an observed case analysis were used to explore factors associated with both gender and unfavourable treatment outcome. RESULTS: The per-protocol population included 472/1548 (30%) women. Women were younger and had lower rates of cavitation, smoking and weight (all p < 0.05) and higher prevalence of HIV (10% vs 6%, p = 0.001). They received higher doses (mg/kg) than men of rifampicin, isoniazid, pyrazinamide and moxifloxacin (p ≤ 0.005). There was no difference in baseline smear grading or mycobacterial growth indicator tube (MGIT) time to positivity. Women converted to negative cultures more quickly than men on Lowenstein-Jensen (HR 1.14, p = 0.008) and MGIT media (HR 1.19, p < 0.001). In men, the presence of cavitation, positive HIV status, higher age, lower BMI and 'ever smoked' were independently associated with unfavourable treatment outcome. In women, only 'ever smoked' was independently associated with unfavourable treatment outcome. Only for cavitation was there a gender difference in treatment outcomes by regimen; their outcome in the 4-month arms was significantly poorer compared to the 6-month treatment arm (p < 0.001). Women, with or without cavities, and men without cavities had a similar outcome on all treatment ar
- Published
- 2018