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| Variables | Case (n = 1601) n(%) | Control (n = 1526) n(%) | t/χ2 | P |
|---|---|---|---|---|
| Age(years) | ||||
| Mean ± SD | 52.1 ± 17.7 | 52.4 ± 17.0 | 0.564 | 0.573 |
| Sex | 0.321 | 0.571 | ||
| Male | 1181(73.8) | 1112(72.9) | ||
| Female | 420(26.2) | 414(27.1) | ||
| Smoking | 84.730 | <0.001 | ||
| Never | 762(47.6) | 976(64.0) | ||
| Ever | 839(52.4) | 550(36.0) | ||
| Drink | 9.065 | 0.003 | ||
| Never | 1246(77.8) | 1117(73.2) | ||
| Ever | 355(22.2) | 409(26.8) | ||
| Sputum smear test | – | – | ||
| Positive | 1080(67.5) | – | ||
| Negative | 521(32.5) | – | ||
