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Table 3 Respiratory symptoms in relation to living with smokers

From: Respiratory symptoms in relation to residential coal burning and environmental tobacco smoke among early adolescents in Wuhan, China: a cross-sectional study

  Cough with colds Cough without colds
  No Yes    No Yes   
Exposure N N OR* (95% CI) N N OR* (95% CI)
Total 3413 1117    4327 203   
Smokers in the home         
   No 954 259 1.00   1165 48 1.00  
   Yes 2459 858 1.29 (1.05,1.58) 3162 155 1.19 (0.86,1.65)
1 smoker 2105 717 1.26 (1.02,1.55) 2700 122 1.10 (0.77,1.57)
2+ smokers 354 141 1.47 (1.11,1.95) 462 33 1.74 (1.17,2.60)
  Phlegm with colds Phlegm without colds
  No Yes    No Yes   
  N N OR* (95% CI) N N OR* (95% CI)
Total 3772 758    4274 256   
Smokers in the home         
   No 1036 177 1.00   1164 49 1.00  
   Yes 2736 581 1.24 (1.08,1.43) 3110 207 1.60 (1.11,2.29)
1 smoker 2327 495 1.25 (1.09,1.43) 2657 165 1.49 (1.04,2.14)
2+ smokers 409 86 1.23 (0.92,1.64) 453 42 2.25 (1.36,3.72)
  Wheeze with colds Wheeze without colds
  No Yes    No Yes   
  N N OR* (95% CI) N N OR* (95% CI)
Total 3652 878    4210 320   
Smokers in the home         
   No 993 220 1.00   1125 88 1.00  
   Yes 2659 658 1.11 (0.93,1.31) 3085 232 0.96 (0.74,1.25)
1 smoker 2265 557 1.10 (0.93,1.30) 2619 203 0.99 (0.75,1.30)
2+ smokers 394 101 1.13 (0.85,1.49) 466 29 0.78 (0.45,1.37)
  1. * Odds ratios (OR) adjusted for gender, coal use, and school district. Dichotomous and multilevel odds ratios are computed in separate models.