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Tab 1 The general characteristics between oral squamous cell carcinoma group and control group
| 临床特征 | 病例组（n=750） | 对照组（n=750） | P值 | |
| 年龄（岁，x±s） | 55.69±4.82 | 55.71±4.62 | >0.05 | |
| 性别（n/%） | 男 | 512/68.27 | 510/68.00 | >0.05 |
| 女 | 238/31.73 | 240/32.00 | ||
| 饮酒状况（n/%） | - | 266/35.57 | 448/59.73 | <0.01 |
| + | 484/64.53 | 302 /40.27 | ||
| DI（n/%） | ≤3 000 | 119/15.87 | 202 /26.93 | <0.01 |
| >3 000 | 365/48.67 | 100/13.33 | ||
