Table 2 Patient demographics
Type of surgery | TKA | THA | HFS | Rupture of Achilles tendon | Simple fracture of lower extremities | ||||
|---|---|---|---|---|---|---|---|---|---|
5023 (13.6)a | 3856 (10.4)a | 20,991 (70.3)a | 572 (1.5)a | 6639 (18.0)a | |||||
Sex | |||||||||
 Male | 906 (18.0) | 657 | (17.0) | 4815 | (22.9) | 385 | (67.3) | 3733 | (56.2) |
 Female | 4117 (82.0) | 3199 | (83.0) | 16,176 | (77.1) | 187 | (32.7) | 2906 | (43.8) |
Age (years) | |||||||||
 <65 | 575 (11.4) | 1518 | (39.4) | 1850 | (8.8) | 492 | (86.0) | 4302 | (64.8) |
 65 to 75 years | 1713 (34.1) | 1173 | (30.4) | 2573 | (12.3) | 58 | (10.1) | 1237 | (18.6) |
 ≧75 | 2735 (54.4) | 1165 | (30.2) | 16,568 | (78.9) | 22 | (3.8) | 1100 | (16.6) |
 Mean ± SD | 74.1 ± 7.9 | 67.4 ± 10.8 | 80.4 ± 12.7 | 45.5 ± 15.4 | 53.1 ± 21.4 | ||||
Body weight (kg) | |||||||||
 Mean ± SD | 59.0 ± 11.1 | 55.6 ± 11.2 | 47.4 ± 10.4 | 67.6 ± 13.2 | 61.1 ± 13.7 | ||||
Body Mass Index (kg/m2) | |||||||||
 <18.5 | 93 (1.9) | 246 | (6.4) | 4632 | (22.1) | 8 | (14) | 464 | (7.0) |
 18.5 to 25.0 | 1878 (37.4) | 2085 | (54.1) | 10,371 | (49.4) | 272 | (47.6) | 3543 | (53.4) |
 ≧25.0 | 2270 (45.2) | 1133 | (29.4) | 1968 | (9.4) | 191 | (33.4) | 1594 | (24.0) |
 Unknown | 782 (15.6) | 392 | (10.2) | 4020 | (19.2) | 101 | (17.7) | 1038 | (15.6) |
 Mean ± SD | 25.6 ± 4.0 | 23.6 ± 4.0 | 20.7 ± 3.6 | 24.5 ± 3.5 | 23.3 ± 4.2 | ||||
Etiologyb | |||||||||
 Osteoarthritis | 4078 (81.2) | 2848 | (73.9) | – | – | – | |||
 Rheumatoid arthritis | 252 (5.0) | 82 | (2.1) | – | – | – | |||
 Idiopathic osteonecrosis | 147 (2.9) | 265 | (6.9) | – | – | – | |||
 Femoral neck fracture | – | – | 18,518 | (88.2) | – | – | |||
 Others | 573 (11.4) | 687 | (17.8) | 2248 | (12.1) | – | – | ||
Type of anesthesia | |||||||||
 Spinal anesthesia | 293 (5.8) | 56 | (15) | 8737 | (41.6) | 281 | (49.1) | 2760 | (41.6) |
 Epidural anesthesia | 2523 (50.2) | 2318 | (60.1) | 1408 | (6.7) | 2 | (0.3) | 438 | (6.6) |
 General anesthesia | 2203 (43.9) | 1480 | (38.4) | 10,768 | (51.3) | 189 | (33.0) | 3392 | (51.1) |