Table 1.
Patient and implant characteristics of overall sample and by surgical approach, 2001–2011
| Variables | Total | Anterolateral | Direct lateral | Posterior | Direct anterior | Missing |
|---|---|---|---|---|---|---|
| Total number (%) | 42,438 | 4226 (10) | 667 (2) | 31,747 (75) | 1851 (4) | 3947 (9) |
| Mean age (years; SD) | 66 (12) | 67 (11) | 65 (11) | 66 (12) | 65 (11) | 65 (12) |
| Mean BMI (kg/m2; SD) | 29 (6) | 29 (6) | 30 (6) | 290 (6) | 28 (5) | 29 (6) |
| Number (%) | Number (%) | Number (%) | Number (%) | Number (%) | Number (%) | p value | ||
|---|---|---|---|---|---|---|---|---|
| Sex | Male | 18,007 (42) | 1788 (42) | 281 (42) | 13,478 (43) | 736 (40) | 1724 (44) | 0.097 |
| Female | 24,415 (58) | 2435 (58) | 385 (58) | 18,264 (58) | 1112 (60) | 2219 (56) | ||
| Missing | 16 (0) | 3 (0) | 1 (0) | 5 (0) | 3 (0) | 4 (0) | ||
| Race | White | 31,939 (75) | 3460 (82) | 470 (71) | 23,576 (74) | 1504 (81) | 2929 (74) | < 0.001 |
| Black | 3265 (8) | 176 (4) | 68 (10) | 2567 (8) | 135 (7) | 319 (8) | ||
| Hispanic | 3035 (7) | 202 (5) | 28 (4) | 2432 (8) | 82 (4) | 291 (7) | ||
| Native American | 88 (0) | 4 (0) | 2 (0) | 69 (0) | 6 (0) | 7 (0) | ||
| Asian | 1469 (4) | 129 (3) | 16 (2) | 1164 (4) | 38 (2) | 122 (3) | ||
| Other | 328 (1) | 23 (1) | 5 (1) | 255 (1) | 16 (1) | 29 (1) | ||
| Multirace | 272 (1) | 22 (1) | 3 (0) | 214 (1) | 15 (1) | 18 (1) | ||
| Missing | 2042 (5) | 210 (5) | 75 (11) | 1470 (5) | 55 (3) | 232 (6) | ||
| DePuy’s ASR Hip Component | 649 (2) | 43 (1) | 5 (1) | 486 (2) | 8 (0) | 107 (3) | ||
| Bearing surface | Ceramic on ceramic | 564 (1) | 75 (2) | 4 (1) | 436 (1) | 2 (0) | 47 (1) | < 0.001 |
| Ceramic on constrained | 12 (0) | 0 (0) | 0 (0) | 12 (0) | 0 (0) | 0 (0) | ||
| Ceramic on conventional | 126 (0) | 6 (0) | 1 (0) | 95 (0) | 0 (0) | 24 (1) | ||
| Ceramic on crosslinked | 9111 (22) | 824 (20) | 158 (24) | 6777 (210) | 598 (32) | 754 (19) | ||
| Ceramic on metal | 122 (0) | 10 (0) | 3 (0) | 63 (0) | 28 (2) | 18 (1) | ||
| Metal on constrained | 37 (0) | 2 (0) | 1 (0) | 30 (0) | 1 (0) | 3 (0) | ||
| Metal on conventional | 1780 (4) | 110 (3) | 25 (4) | 1433 (5) | 0 (0) | 212 (5) | ||
| Metal on crosslinked | 24,685 (58) | 2579 (61) | 367 (55) | 18,533 (58) | 1077 (58) | 2129 (54) | ||
| Metal on metal | 5114 (12) | 534 (13) | 88 (13) | 3743 (12) | 102 (6) | 647 (16) | ||
| Missing | 887 (2) | 86 (2) | 20 (3) | 625 (2) | 43 (2) | 113 (3) | ||
| ASA | 1 | 1390 (3) | 151 (4) | 26 (4) | 996 (3) | 67 (4) | 150 (4) | < 0.001 |
| 2 | 24,704 (58) | 2421 (57) | 405 (61) | 18,472 (58) | 1124 (61) | 2282 (58) | ||
| ≥ 3 | 15,022 (35) | 1578 (37) | 214 (32) | 11,344 (36) | 581 (31) | 1305 (33) | ||
| Missing | 1322 (3.) | 76 (2) | 22 (3) | 935 (3) | 79 (4) | 210 (5) | ||
| Fixation | Uncemented | 35,024 (83) | 3653 (86) | 580 (87) | 27,145 (86) | 1768 (96) | 1878 (48) | < 0.001 |
| Hybrid | 4185 (10) | 408 (10) | 48 (7) | 3488 (11) | 3 (0) | 238 (6) | ||
| Cemented | 226 (1) | 15 (0) | 7 (1) | 169 (1) | 0 (0) | 35 (1) | ||
| Missing | 3003 (7) | 150 (4) | 32 (5) | 945 (3) | 80 (4) | 1796 (46) | ||
| Head size (mm) | ≤ 28 | 8002 (19) | 758 (18) | 77 (12) | 6438 (20) | 63 (3) | 666 (17) | < 0.001 |
| 32 | 14,418 (34) | 1485 (35) | 201 (30) | 11,034 (35) | 423 (23) | 1275 (32) | ||
| 36 | 15,441 (36) | 1502 (36) | 264 (40) | 11,119 (35) | 1166 (63) | 1390 (35) | ||
| > 36 | 3882 (9) | 412 (10) | 112 (17) | 2678 (8) | 159 (9) | 521 (13) | ||
| Missing | 695 (2) | 69 (2) | 13 (2) | 478 (2) | 40 (2) | 95 (2) | ||
BMI = body mass index; ASA = American Society of Anesthesiologists.