Table 2.

Comparison of demographics and fracture characteristics between the two groups.

Variables	Overall (N = 1672)	Without DVT (N = 1549)	With DVT (N = 123)	P value
Age (> 70, years), n (%)	1155 (69.1)	1058 (68.3)	97 (78.9)	0.015
Gender (male), n (%)	707 (42.3)	656 (42.3)	51 (41.5)	0.848
Residential location (urban), n (%)	749 (44.8)	692 (44.7)	57 (46.3)	0.720
Hypertension, n (%)	746 (44.6)	694 (44.8)	52 (42.3)	0.587
Diabetes, n (%)	342 (20.5)	313 (20.2)	29 (23.6)	0.372
Cerebrovascular disease, n (%)	515 (30.8)	471 (30.4)	44 (35.8)	0.215
Cardiovascular disease, n (%)	551 (33.0)	502 (32.4)	49 (39.8)	0.009
Chronic respiratory disease, n (%)	83 (5.0)	79 (5.1)	4 (3.3)	0.364
Smoking history, n (%)	113 (6.8)	107 (6.9)	6 (4.9)	0.388
Preoperative systemic infection, n (%)	41 (2.5)	41 (2.6)	0 (0.0)	0.068
Tumors, n (%)	36 (2.2)	33 (2.1)	3 (2.4)	0.820
Traumatic brain injury, n (%)	20 (1.2)	16 (1.1)	4 (3.3)	0.029
Liver disease, n (%)	36 (2.2)	33 (2.1)	3 (2.4)	0.820
Renal disease, n (%)	48 (2.9)	47 (3.0)	1 (0.8)	0.156
Rheumatoid diseases, n (%)	21 (1.3)	20 (1.3)	1 (0.8)	0.647
Previous surgical history	258 (15.4)	234 (15.1)	24 (19.5)	0.193
Comorbidities (no.), n (%)				0.004
0	323 (19.3)	309 (19.9)	14 (11.4)
1–2	758 (45.3)	708 (45.7)	50 (40.7)
≥ 3	591 (35.3)	532 (34.3)	59 (48.0)
ASA3–4, n (%)	767 (45.9)	707 (45.9)	60 (48.8)	0.891
BMI, n (%)				0.664
< 18.5	93 (5.6)	88 (5.7)	5 (4.1)
18.5–23.9	1009 (60.3)	939 (60.6)	70 (56.9)
24–27.9	428 (25.6)	394 (25.4)	34 (27.6)
28–31.9	115 (6.9)	104 (6.7)	11 (8.9)
≥ 32	27 (1.6)	24 (1.5)	3 (2.4)
Injury mechanism (high energy), n (%)	139 (8.3)	126 (8.1)	13 (10.6)	0.346
Side (left), n (%)	809 (48.4)	707 (51.5)	66 (53.7)	0.637

ASA American Society of Anesthesiologists, BMI body mass index.