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DVT
PE
VTED
N (%)
P value
N (%)
P value
N (%)
P value
Age (years)
18–54 (N = 23,636)
192 (0.8%)
< 0.001 a
103 (0.4%)
< 0.001
274 (1.2%)
< 0.001
55–75 (N = 143,972)
1182 (0.8%)
815 (0.6%)
1858 (1.3%)
> 75 (N = 45,626)
471 (1.0%)
323 (0.7%)
722 (1.6%)
Body mass index (kg/m2 )
< 25 (N = 21,699)
189 (0.9%)
0.101
75 (0.3%)
< 0.001
244 (1.1%)
0.023
25–34.99 (N = 119,669)
1083 (0.9%)
681 (0.6%)
1638 (1.4%)
35–44.99 (N = 60,374)
485 (0.8%)
419 (0.7%)
828 (1.4%)
45+ (N = 11,492)
88 (0.8%)
66 (0.6%)
144 (1.3%)
Sex
Male (N = 82,759)
743 (0.9%)
0.203
421 (0.5%)
< 0.001
1090 (1.3%)
0.498
Female (N = 130,475)
1102 (0.8%)
820 (0.6%)
1764 (1.4%)
History of smoking (N = 18,142)
160 (0.9%)
0.806
897 (0.5%)
0.062
229 (1.3%)
0.362
History of diabetes mellitus (N = 37,948)
289 (0.8%)
0.016
224 (0.6%)
0.826
486 (1.3%)
0.290
Anesthesia type
Regional (N = 107,001)
862 (0.8%)
0.003
641 (0.6%)
0.319
1387 (1.3%)
0.083
General (N = 105,931)
982 (0.9%)
599 (0.6%)
1465 (1.3%)
ASA class
Class 1 (N = 4231)
40 (0.9%)
0.337
14 (0.3%)
0.075
51 (1.2%)
0.097
Class 2 (N = 106,509)
884 (0.8%)
600 (0.6%)
1366 (1.3%)
Class 3 (N = 99,006)
892 (0.9%)
607 (0.6%)
1390 (1.4%)
Class 4 (N = 3488)
29 (0.8%)
20 (0.6%)
47 (1.3%)
Operative time (hours)
< 2 (N = 172,154)
1467 (0.9%)
0.406
992 (0.6%)
0.066
2270 (1.3%)
0.117
2–4 (N = 33,384)
308 (0.9%)
189 (0.6%)
463 (1.4%)
> 4 (N = 7696)
70 (0.9%)
60 (0.8%)
121 (1.6%)
Arthroplasty type
Primary total Knee arthroplasty (N = 191,810)
1706 (0.9%)
< 0.001
1169 (0.6%)
< 0.001
2655 (1.4%)
< 0.001
Unicompartmental knee arthroplasty (N = 9294)
36 (0.4%)
22 (0.2%)
52 (0.6%)
Revision total knee arthroplasty (N = 12,130)
103 (0.8%)
50 (0.4%)
147 (1.2%)
a Bold type signifies statistical significance, P < 0.05
