Table 5. Background characteristics of NTM-positive and NTM-negative persons, Zambia, August 2002–March 2003*.
| Characteristic | NTM positive, no. (%) | NTM negative, no. (%) | p value | All persons, no. (%) |
|---|---|---|---|---|
| Persons | 93 (16.5) | 472 (83.7) | – | 565 |
| Female | 61 (65.6) | 303 (64.2) | 0.8 | 364 (64.4) |
| Age, y, mean (SD) | 36.7 (13.1) | 34.8 (14.6) | 0.2 | 35.1 (14.4) |
| Farmer | 48 (51.6) | 245 (51.9) | 1.0 | 293 (51.9) |
| Used tap water | 23 (25.0) | 62 (13.2) | 0.004 | 85 (15.1) |
| Used unboiled milk | 15 (16.1) | 62 (13.1) | 0.4 | 77 (13.6) |
| Smoker | 5 (5.7) | 41 (8.9) | 0.3 | 46 (8.4) |
| Used alcohol | 9 (10.3) | 51 (11.2) | 0.8 | 60 (11.0) |
| Hospitalized | 31 (33.3) | 149 (31.6) | 0.7 | 180 (31.9) |
| Previously treated for TB | 9 (9.7) | 28 (5.9) | 0.2 | 37 (6.6) |
*NTM, nontuberculous mycobacteria; TB, tuberculosis.