Table 1. Characteristics of reported tuberculosis cases infected with nontuberculous mycobacterium (NTM) compared with those infected with M. tuberculosis.
| Total | M. tuberculosis | NTM | Adjusted odds ratio | |
|---|---|---|---|---|
| N = (col%) | N = (row %) | N = (row %) | (95% CI) | |
| Total | 4206(100.0) | 3316(78.8) | 890(21.2) | |
| Sex | ||||
| Male | 2776(66.0) | 2281(82.2) | 495(17.8) | Ref |
| Female | 1430(34.0) | 1035(72.4) | 395(27.6) | 1.93 (1.63–2.28) |
| Age(years) | ||||
| ≤44 | 774(18.4%) | 684(88.4%) | 90(11.6%) | Ref |
| 45–64 | 993(23.6%) | 757(76.2%) | 236(23.8%) | 2.58 (1.97–3.40) |
| 65–74 | 652(15.5%) | 495(75.9%) | 157(24.1%) | 2.63 (1.95–3.53) |
| ≥75 | 1787(42.5%) | 1380(77.2%) | 407(22.8%) | 2.47(1.90–3.21) |
| Smear | ||||
| Positive | 2096(49.8) | 1612(76.9) | 484(23.1) | 1.26 (1.08–1.47) |
| Negative* | 2110(50.2) | 1704(80.8) | 406(19.2) | Ref |
| Type of case | ||||
| New | 3676(87.4) | 2975(80.9) | 701(19.1) | Ref |
| Retreatment | 530(12.6) | 341(64.3) | 189(35.7) | 2.30(1.88–2.82) |
| HIV Infection | ||||
| No | 3641(86.6) | 2845(78.1) | 796(21.9) | Ref |
| Yes | 16(0.4) | 10(62.5) | 6(37.5) | 4.67(1.61–13.52) |
| Unknown | 549(13.0) | 461(84.0) | 88(16.0) | 0.74(0.58–0.96) |
| Smoking | ||||
| Never | 3147(74.8) | 2412(76.6) | 735(23.4) | 1.46(1.17–1.82) |
| Ever | 906(21.6) | 779(85.9) | 128(14.1) | Ref |
| Unknown | 152(3.6) | 125(82.2) | 27(17.8) | 1.26(0.79–2.03) |
* Nine patients without smear results were classified together as smear negative;
CI: confidence interval.