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Characteristics summary of study subjects
| LSCC (n=331) | Controls (n=349) | P values* | |
|---|---|---|---|
| Age (years), Mean ±SD | 60.42±10.00 | 62.02±8.61 | |
| Gender, n (%) | 0.0004 | ||
| Male | 308 (93.1) | 295 (84.5) | |
| Female | 23 (6.9) | 54 (15.5) | |
| Smoking status | < 0.0001 | ||
| Nonsmoker, n (%) | 46 (13.9) | 145 (41.5) | |
| Smoker, n (%) | 285 (86.1) | 204 (58.5) | |
| Drinking status | < 0.0001 | ||
| Nondrinker, n (%) | 111 (33.5) | 193 (55.3) | |
| Drinker, n (%) | 220 (66.5) | 156 (44.7) |
P values are calculated by using chi-squared test.
