| 因素 | 对照组(n = 450例) | 病例组(n = 81例) | t/χ2 | P |
| 年龄(岁) | 77.07 ± 7.80 | 77.96 ± 8.27 | 0.11 | 0.347 |
| 性别 |
|
| 0.18 | 0.148 |
| 女性 | 200 (44.44%) | 29 (35.80%) |
|
|
| 男性 | 250 (55.56%) | 52 (64.20%) |
|
|
| 吸烟 |
|
| 0.31 | 0.008 |
| 否 | 332 (73.78%) | 48 (59.26%) |
|
|
| 是 | 118 (26.22%) | 33 (40.74%) |
|
|