Nontuberculous pulmonary mycobacteriosis in Denmark: incidence and prognostic factors

American Journal of Respiratory and Critical Care Medicine
Claire AndréjakReimar W Thomsen


Few population-based data are available regarding nontuberculous mycobacteria (NTM) pulmonary disease epidemiology and prognosis. To examine NTM pulmonary colonization incidence, disease incidence, and prognostic factors. All adults in Denmark with at least one NTM-positive pulmonary specimen during 1997 to 2008 were identified using national medical databases and were categorized as having possible or definite NTM disease or colonization. We calculated annual age-standardized NTM incidence rates and adjusted hazard ratios (HR) of death associated with patient age, sex, comorbidity, NTM species, and NTM disease status. Of 1,282 adults with 2,666 NTM-positive pulmonary specimens, 335 (26%) had definite NTM disease, 238 (19%) possible disease, and 709 (55%) colonization only. NTM incidence rates decreased until 2002, followed by an increase from 2003 to 2008 (mean annual rate per 100,000 person-years: NTM colonization, 1.36; NTM disease, 1.08). Five-year mortality after definite NTM disease was 40.1%. After controlling for potential confounders, 5-year mortality for definite NTM disease was slightly higher than for NTM colonization (adjusted hazard ratio [HR], 1.15; 95% confidence interval [CI], 0.90-1.51). Mycobacterium xenopi w...Continue Reading

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