Table 1—

Baseline characteristics, follow-up and relapses of 75 patients with Mycobacterium kansasii lung disease

Age yrs49.5±13.3
Sex male71 (94.7)
Comorbid conditions
 Smoking65 (86.7)
 COPD#33 (44.0)
 Previous tuberculosis17 (23.6)§
 Diabetes mellitus8 (10.7)
 Malignancy7 (9.3)
 Alcohol abuse24 (32.0)
 None24 (32.4)ƒ
Cavitation on chest radiograph54 (72.0)
Positive smear49 (66.2)ƒ
Duration of treatment months
 Rifampin12.5±0.7
 Isoniazid12.2±1.6
 Ethambutol11.9±1.2
 Streptomycin2.2±0.5
Good treatment compliance69 (92.0)
Duration of follow-up after treatment months50.1±36.1
Relapses+
 Cumulative incidence rate5 (6.6)
 Incidence rate per 100 patient-yrs2.19 (0.71–5.12)
  • Data are presented as mean±sd, n (%) or rate (95% confidence interval). COPD: chronic obstructive pulmonary disease. #: includes COPD and other chronic pulmonary diseases such as pneumoconiosis and bronchiectasis; : for sputum or bronchial washing; +: calculated for patients who had at least one visit after stopping treatment, and accounting for no more than 5 yrs of follow-up; §: data for 72 patients; ƒ: data for 74 patients.