From: Directly measured secondhand smoke exposure and COPD health outcomes
SHS exposure | COPD severity | Â | Physical health status (SF-12) | Â | Disease-specific QOL | Â | Dyspnea | Â |
---|---|---|---|---|---|---|---|---|
 | Bivariate | Multivariate | Bivariate | Multivariate | Bivariate | Multivariate | Bivariate | Multivariate |
Urine cotinine | Â | Â | Â | Â | Â | Â | Â | Â |
1st tertile | Referent | Referent | Referent | Referent | Referent | Referent | Referent | Referent |
2nd tertile | 2.8 (-1.2 to 6.7) | 1.9 (-2.3 to 6.0) | 0.4 (-6.3 to 7.0) | 2.6 (-4.2 to 9.4) | -0.3 (-3.1 to 2.5) | -1.4 (-4.1 to 1.3) | 0.1 (-0.8 to 0.6) | -0.2 (-0.8 to 0.4) |
3rd tertile | 5.8 (1.5 to 10.2) | 4.7 (-0.1 to 9.4)* | -7.8 (-15 to -0.6) | -5.7 (-14 to 2.0) | 4.5 (1.3 to 7.6) | 2.9 (-0.16 to 5.9)†| 1.2 (0.5 to 1.9) | 0.9 (0.2 to 1.6) |
Nicotine badge | Â | Â | Â | Â | Â | Â | Â | Â |
1st tertile | Referent | Referent | Referent | Referent | Referent | Referent | Referent | Referent |
2nd tertile | 0.5 (-3.6 to 4.6) | 1.0 (-3.3 to 5.3) | 0.1 (-6.8 to 6.9) | -0.2 (-7.2 to 6.9) | -0.2 (-3.1 to 2.8) | 0.3 (-2.5 to 3.0) | -0.1 (-0.8 to 0.6) | 0 (-0.7 to 0.6) |
3rd tertile | -0.7 (-4.8 to 3.5) | -0.3 (-4.6 to 4.0) | -1.1 (-8.1 to 5.9) | -2.1 (-9.2 to 5.0) | -0.1 9–3.1 to 2.9) | 0.9 (-1.9 to 3.7) | 0 (-0.6 to 0.7) | 0.2 (-0.5 to 0.8) |