Table 1 Selected variable in cases and controls
Variable | Cases n (%) | Controls n (%) | P value |
|---|---|---|---|
Female | 285 | 285 | Â |
Age (years) | 53.9 ± 12.0 | 54.1 ± 9.1 | 0.750 |
Income(yuan/month) | 619.34 ± 374.59 | 557.11 ± 390.61 | 0.071 |
Education | Â | Â | 0.779 |
   Never | 27 (9.5) | 26 (9.1) |  |
   Elementary school | 133 (46.7) | 145 (50.9) |  |
   Junior school | 85 (29.8) | 76 (26.7) |  |
   Senior school and upwards | 40 (14.0) | 38 (13.3) |  |
Family history of cancer | 39 (13.7) | 27 (9.5) | 0.116 |
Passive smoking | 174 (61.1) | 162 (56.8) | 0.307 |
Fuel smoke exposure | 84 (29.5) | 78 (27.4) | 0.577 |
Cooking oil fume exposure | 104 (36.5) | 75 (26.3) | 0.009 |