Table 2 Demographic characteristics of the case and control populations
| Â | Case n (%) | Control n (%) | OR(95%CI) | P |
|---|---|---|---|---|
Male | 60 | 60 | Â | Â |
Female | 47 | 47 | Â | Â |
Mean age (yr) | 62.9 ± 8.19 | 62.4 ± 8.35 |  |  |
Smoking status | Â | Â | Â | Â |
   None-smoker | 40(37.4) | 43(40.2) | 1.00 |  |
   Smoker | 67(62.6) | 64(59.8) | 1.14(0.64–2.04) | 0.67 |
Passive smoking | Â | Â | Â | Â |
   No | 37(34.6) | 54(50.5) | 1.00 |  |
   yes | 70(65.4) | 53(49.5) | 2.04(1.14–3.70) | 0.02 |
Drinking status | Â | Â | Â | Â |
   None-drinker | 60(56.1) | 58(54.2) | 1.00 |  |
   Drinker | 47(43.9) | 49(45.8) | 1.06(0.77–1.43) | 0.70 |
Income (Yuan, Mean ± SD) |  |  |  |  |
   Total | 486.4 ± 425.80 | 592.0 ± 590.63 | 1.0(0.99~1.0) | 0.10 |
   Average | 127.2 ± 98.68 | 148.2 ± 122.28 | 0.998(0.995~1) | 0.15 |
Family history of cancer | Â | Â | Â | Â |
   Negative | 39(36.4) | 49(45.8) | 1.00 |  |
   Positive | 68(63.6) | 58(54.2) | 2.90(1.41–5.95) | <0.01 |