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Table 1 Characteristics of cases and controls

From: Indoor solid fuel use and tuberculosis in China: a matched case-control study

  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   
   Male 147 (72.8%) 290 (71.8%)
   Female 55 (27.2%) 114 (28.2%)
Solid fuel for cooking   
   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   
   Yes 21 (10.4%) 43 (10.6%)
   No 177 (87.6%) 356 (88.1%)
   Unknown 4 (2.0%) 5(1.2%)
Household contact history*   
   Yes 40 (19.8%) 3 (0.7%)
   No 143 (70.8%) 371 (91.8%)
   Unknown 19 (9.1%) 30 (7.4%)
Ever smoke   
   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   
   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)   
   Yes 20 (9.9%) 48 (11.9%)
   No 181(89.6%) 352(87.1%)
   Unknown 1(0.5%) 4 (1.0%)
  1. * Family member with tuberculosis in past 5 years