Table 4 Predictors of absolute FEV1 level and FEV1/FVC (%): in a multiple linear regression modela
From: Second-hand smoke and chronic bronchitis in Taiwanese women: a health-care based study
Variables | Â | Â | Adjusted analysis | Â | Adjusted analysis | ||
|---|---|---|---|---|---|---|---|
|  | N | FEV1 (L) (mean ± SD) | β(SE) | p-value | FEV1/FVC (%)(mean ± SD) | β(SE) | p-value |
Age | 417 | 1.56 ± 0.46 | -0.022 (0.002) | <0.01 | 81.10 ± 15.59 | -0.134 (0.090) | 0.14 |
Height | 417 | Â | 0.021 (0.004) | <0.01 | Â | 0.421 (0.146) | <0.01 |
Education levels | Â | Â | Â | Â | Â | Â | Â |
   ≥junior high school | 71 | 1.80 ± 0.41 | 1 |  | 80.94 ± 14.79 | 1 |  |
   primary school | 225 | 1.59 ± 0.46 | -0.044 (0.053) | 0.41 | 81.04 ± 15.79 | 1.820 (2.142) | 0.4 |
   illiteracy | 121 | 1.37 ± 0.40 | -0.079 (0.063) | 0.21 | 81.32 ± 15.79 | 3.068 (2.554) | 0.23 |
Cigarette smoking and cumulative SHS exposure year | Â | Â | Â | Â | Â | Â | Â |
   Non-smoker | 131 | 1.60 ± 0.41 | 1 |  | 86.83 ± 12.57 | 1 |  |
   Second-hand smoker |  |  |  |  |  |  |  |
1 < SHS < 32 | 131 | 1.63 ± 0.47 | -0.095 (0.046) | 0.04 | 80.70 ± 14.75 | -5.807 (1.900) | <0.01 |
SHS ≥ 32 | 129 | 1.51 ± 0.47 | -0.113 (0.046) | 0.01 | 77.07 ± 16.86 | -9.436 (1.869) | <0.01 |
   Smoker | 26 | 1.29 ± 0.50 | -0.246 (0.079) | <0.01 | 74.24 ± 18.18 | -11.592 (3.226) | <0.01 |
Burning incense | Â | Â | Â | Â | Â | Â | Â |
   no | 182 | 1.63 ± 0.47 | 1 |  | 81.70 ± 15.57 | 1 |  |
   yes | 235 | 1.51 ± 0.44 | -0.091 (0.037) | 0.02 | 80.64 ± 15.62 | -1.654 (1.523) | 0.28 |
Cooking status | Â | Â | Â | Â | Â | Â | Â |
   no | 17 | 1.56 ± 0.48 | 1 |  | 83.80 ± 15.69 | 1 |  |
   yes | 400 | 1.56 ± 0.46 | 0.012 (0.094) | 0.9 | 80.99 ± 15.59 | -2.243 (3.805) | 0.56 |