Table 1 Characteristics of the participants in the hospital based case-control study
Characteristics | Case (N = 341) | Control (N = 727) | P value |
|---|---|---|---|
Age (years,±SD) | 53.7 ± 13.0 | 51.6 ± 11.2 | 0.010 |
Sex | Â | Â | Â |
  Male | 184 (54.0%) | 409 (56.3%) | 0.481 |
  Female | 157 (46.0%) | 318 (53.7%) | |
Smoke | Â | Â | Â |
  No | 216 (63.3%) | 445 (61.2%) | 0.503 |
  Yes | 125 (36.7%) | 282 (38.8%) | |
Alcohol (>15Â g/d) | Â | Â | Â |
  No | 252 (73.9%) | 582 (80.1%) | 0.023 |
  Yes | 89 (26.1%) | 145 (19.9%) | |
Recruited Center | Â | Â | Â |
  Xi’nan Hospital | 165 (48.4%) | 360 (49.5%) | 0.545 |
  Xinqiao Hospital | 128 (40.5%) | 282 (38.8%) | |
  Daping Hospital | 48 (11.1%) | 85 (11.7%) |