表 4. Comparison of surgery-related factors between VTE and non-VTE groups.
VTE与非VTE患者手术相关因素比较
| Factor | Non-VTE (n = 265) | VTE (n = 42) | t/χ 2 | P |
| ASA: American Society of Anesthesiologists. a and b The same superscript letters indicate no statistically significant difference between subsets (at the 0.05 level). | ||||
| Surgical approach/case (%) | ||||
| Laparoscopy | 154 (58.11) | 20 (47.62) | 2.761 | 0.252 |
| Vaginal surgery | 92 (34.72) | 16 (38.10) | ||
| Open surgery | 19 (7.17) | 6 (14.29) | ||
| Anesthesia time/min | 121.94 ± 59.72 | 152.62 ± 67.06 | －3.040 | 0.003 |
| Sugical duration/min | 100.28 ± 55.17 | 135.40 ± 61.16 | －3.776 | < 0.001 |
| Intraoperative blood loss/mL | 84.87 ± 133.95 | 114.17 ± 196.15 | －1.226 | 0.221 |
| ASA grade/case (%) | ||||
| Grade Ⅱ | 218 (82.26)a | 25 (59.52)b | 17.518 | < 0.001 |
| Grade Ⅲ | 44 (16.60)a | 11 (26.19)a | ||
| Grade Ⅳ | 3 (1.13)a | 6 (14.29)b | ||