Table 3 Surgical factors related to DVT in patients with femoral neck fracture

Anesthesia duration (h)

< 3^a

35 (7.9%)

406 (92.1%)

≥ 3^b

61 (14.7%)

355 (85.3%)

Anesthesia method

General anesthesia^a

52 (14.9%)

297 (85.1%)

Intraspinal anesthesia^a

35 (11.7%)

297 (88.3%)

Local anesthesia^b

9 (4.3%)

199 (95.7%)

Operative method

Rreduction and internal fixation^a

13 (3.4%)

368 (96.6%)

Joint replacement^b

83 (17.4%)

393 (82.6%)

Intraoperative blood loss (ml)

< 200^a

17 (4.3%)

375 (95.7%)

200–400^b

51 (15.0%)

290 (85.0%)

> 400^b

28 (22.6%)

96 (77.4%)