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Volume 15, Number 2—February 2009


Nontuberculous Mycobacteria, Zambia

Patricia C.A.M. BuijtelsComments to Author , Marianne A.B. van der Sande, Cas S. de Graaff, Shelagh Parkinson, Henri A. Verbrugh, Pieter L.C. Petit, and Dick van Soolingen
Author affiliations: Medical Centre Rijnmond-Zuid, Rotterdam, the Netherlands (P.C.A.M. Buijtels); University Medical Center Rotterdam, Rotterdam (P.C.A.M. Buijtels, H.A. Verbrugh); National Institute of Public Health and the Environment, Bilthoven, the Netherlands (M.A.B. van der Sande, D. van Soolingen); Medical Centre Alkmaar, Alkmaar, the Netherlands (C.S. de Graaff); St. Francis Hospital, Katete, Zambia (S. Parkinson); Vlietland Hospital, Schiedam, the Netherlands (P.L.C. Petit)

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Table 6

Crude and adjusted risk factors for isolation of NTM from sputum samples, Zambia, August 2002–March 2003*

Factor Univariate analysis, OR (95% CI) Multivariate analysis, OR (95% CI)†
Hospitalized 1.1 (0.7–1.7) NS
Age >25 y 1.3 (0.8–2.5) NS
Sex (female) 1.1 (0.7–1.7) NS
Underweight (BMI <18) 1.6 (1.0–2.7) 1.7 (1.0–2.9)
Mycobacterium tuberculosis infection 1.1 (0.6–2.0) NS
Previous treatment for TB 1.7 (0.8–3.7) NS
HIV positive 1.3 (0.8–2.1) NS
Used tap water 2.2 (1.3–3.8) 2.0 (1.1–3.5)
Used alcohol 0.9 (0.4–1.9) NS
Smoker 0.6 (0.2–1.6) NS
Used unboiled milk 1.3 (0.7–2.3) NS
Farmer 1.0 (0.6–1.5) NS
Chest radiograph compatible with TB but culture negative for M. tuberculosis 4.7 (1.6–13.9) NS

*NTM, nontuberculous mycobacteria; OR, odds ratio; CI, confidence interval; NS, not significant; BMI, body mass index; TB, tuberculosis.
†Stepwise backward elimination.

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