Table 1 Characteristics of cases and controls
From: Indoor solid fuel use and tuberculosis in China: a matched case-control study
| Â | Case | Control |
|---|---|---|
Total | 202 (100%) | 404 (100%) |
Median age (Mean ± Std Dev) y/o | 63 (57.7 ± 18.8) | 55(53.2 ± 15.4) |
Sex | Â | Â |
   Male | 147 (72.8%) | 290 (71.8%) |
   Female | 55 (27.2%) | 114 (28.2%) |
Solid fuel for cooking | Â | Â |
   Yes | 149 (73.8%) | 293 (72.5%) |
   No | 52(25.7%) | 109(27.0%) |
   Unknown | 1(0.5%) | 2(1.0%) |
Solid fuel for heating | Â | Â |
   Yes | 21 (10.4%) | 43 (10.6%) |
   No | 177 (87.6%) | 356 (88.1%) |
   Unknown | 4 (2.0%) | 5(1.2%) |
Household contact history* | Â | Â |
   Yes | 40 (19.8%) | 3 (0.7%) |
   No | 143 (70.8%) | 371 (91.8%) |
   Unknown | 19 (9.1%) | 30 (7.4%) |
Ever smoke | Â | Â |
   Yes | 106 (52.5%) | 158 (39.1%) |
   No | 94 (46.5%) | 244 (60.4%) |
   Unknown | 2 (1.0%) | 2 (0.5%) |
Daily use of alcohol beverage | Â | Â |
   Yes | 18 (8.9%) | 39 (9.7%) |
   No | 180 (89.1%) | 360 (89.1%) |
   Unknown | 4 (2.0%) | 5 (1.2%) |
Crowding (3 or more people per room) | Â | Â |
   Yes | 20 (9.9%) | 48 (11.9%) |
   No | 181(89.6%) | 352(87.1%) |
   Unknown | 1(0.5%) | 4 (1.0%) |