Annual rates of active tuberculosis(TB) and culture-confirmed TB by smoking status among the whole cohort
| Smoking status | Subjects n | Active TB | Culture-confirmed TB | ||||
| Cases n | Rate# (95% CI) | p-value | Cases n | Rate# (95% CI) | p-value | ||
| Never-smoker | 48 | 5 | 1841 (598–4297) | 0.028 | 3 | 1105 (228–3229) | 0.079 |
| Ex-smoker | 170 | 19 | 2294 (1381–3582) | 13 | 1570 (836–2684) | ||
| Current smoker | 217 | 49 | 4181 (3093–5527) | 33 | 2816 (1938–3954) | ||
| Total | 435 | 73 | 3213 (2519–4040) | 49 | 2157 (1596–2851) | ||
CI: confidence interval. #: calculated over a population of 100,000.