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Table 3 Type of stove used, location, and ventilation among those who used solid fuel for cooking

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

  Case Control
Total 149 (100%) 293 (100%)
Type of stove used for cooking   
   Open fire 0 0
   Surrounded fire 5 (3.4%) 9 (3.1%)
   Improved single-pot stove 4 (2.7%) 5 (1.7%)
   Improved multiple-pot stove 0 1(0.3%)
   Griddle stove 127 (85.2%) 254 (86.7%)
   Unknown 13 (8.2%) 24 (7.4%)
Smoke removed by hood or chimney   
   Yes 137 (92.0%) 272 (92.8%)
   No 11(7.4%) 17 (5.8%)
   Unknown 1 (0.7%) 4(1.4%)
Location of cooking   
   In a room used for living / sleeping 6 (4.0%) 5 (1.7%)
   In a separate room 37(24.8%) 82 (28.0%)
   In a separate building 101 (67.8%) 198 (67.6%)
   Outdoors 1 (0.7%) 1 (0.3%)
   Unknown 4 (2.7%) 7 (2.4%)
Ventilation at location of cooking   
   Closed room 5(3.4%) 4(1.4%)
   Room with eaves spaces 11(7.4%) 43(14.7%)
   Room with open windows / doors 100(67.1%) 169(57.7%)
   Room with 3 or fewer walls 3 (2.0%) 7 (2.4%)
   Other 4(2.7%) 9(3.1%)
   Unknown 26(17.5%) 61(20.8%)