Table 5 Logistic regression analysis analyzing influence of SpCO and other variables on participants self-reporting to have "refrained from taking a job due to shortness of breath" (dependent variable) in participants without active smoking status (N = 808). Independent variables included age and sex, SpCO and other variables when p was ≤ 0.1 from Table 3 (using the same nominal values for variables) as in univariate analysis: place of residence (urban/rural), passive exposure to cigarette smoking, place of cooking in household (cooking outside as reference category), cooking fuel / method of cooking (cooking with gas/electricity as reference category), biomass vs. non-biomass cooking fuel, occupational exposure to dusts vs. fumes (no exposure as reference category). The final model was adapted using forward selection of variables and included the variables listed in the table
Variable | OR ± CI95 | p | |
|---|---|---|---|
SpCO | 1.05 (1.02–1.08) |  < 0.01 | |
Rural setting (vs. urban) | 1.86 (1.05–3.36) | 0.04 | |
Method of cooking | Gas / electricity | Reference category | Â |
Wood on open fire | 4.62 (1.55–13.72) | 0.01 | |
Wood in stove | 2.12 (0.35–13.17) | 0.41 | |
Charcoal | 1.68 (0.59–4.85) | 0.33 | |
Other |  < 0.01 | 1.0 | |