| All patients with preoperative tests N = 55,099 (primary analysis) | Patients without comorbidities N = 6251 (subset) |
---|---|---|
n (%) | n (%) | |
Sex | Â | Â |
 Male | 33,037 (59.96) | 2907 (46.50) |
 Female | 22,062 (40.04) | 3344 (53.50) |
Age (years) | Â | Â |
 8-55 | 10,407 (18.89) | 1759 (28.14) |
 56-63 | 10,910 (19.80) | 1508 (24.12) |
 64-69 | 12,448 (22.59) | 1340 (21.44) |
 70-75 | 10,304 (18.70) | 867 (13.87) |
 76+ | 11,030 (20.02) | 777 (12.43) |
Race | Â | Â |
 Non-Hispanic White | 42,714 (77.52) | 4986 (79.76) |
 Black | 4407 (8.00) | 388 (6.21) |
 Hispanic | 4312 (7.83) | 466 (7.45) |
 Asian/Pacific Islander | 758 (1.38) | 90 (1.44) |
 Other/Missing race | 2908 (5.28) | 321 (5.14) |
Insurance | Â | Â |
 Medicare | 28,303 (51.37) | 2274 (36.38) |
 Medicaid | 2334 (4.24) | 285 (4.56) |
 Commercial | 22,170 (40.24) | 3369 (53.90) |
 Work Comp | 1615 (2.93) | 230 (3.68) |
 Other/Unknown | 677 (1.23) | 93 (1.49) |
Hospital Volume | Â | Â |
 25th | 5546 (10.07) | 587 (9.39) |
 25-50th | 9253 (16.79) | 1015 (16.24) |
 50-75th | 13,395 (24.31) | 1559 (24.94) |
 75th+ | 26,905 (48.83) | 3090 (49.43) |
Surgery Type | Â | Â |
 Total Knee Replacement | 33,930 (61.58) | 3299 (52.78) |
 Total Hip Replacement | 21,169 (38.42) | 2952 (47.22) |