Table 1 Characteristics of the study population according to surgical procedures
Overall | Cervical laminoplasty | Lumbar decompression | Lumbar arthrodesis | Total knee arthroplasty | p | |
|---|---|---|---|---|---|---|
(n = 107,104) | (n = 16,020) | (n = 31,605) | (n = 18,419) | (n = 41,060) | ||
Age, years; mean [SD] | 70.1 [10.7] | 66.2 [11.6] | 68.9 [11.3] | 65.7 [12.1] | 74.6 [6.9] | < 0.001 |
≤ 64 | 25,927 (24.2) | 6,534 (40.8) | 8,898 (28.2) | 6,976 (37.9) | 3,519 (8.6) | |
65–79 | 63,838 (59.0) | 7,678 (47.9) | 18,166 (57.5) | 10,060 (54.6) | 27,394 (68.0) | |
≥ 80 | 17,339 (16.2) | 1,808 (11.3) | 4,541 (14.4) | 1,383 (7.5) | 9,607 (23.4) | |
Sex | ||||||
Men | 45,044 (42.1) | 11,050 (69.0) | 18,735 (59.3) | 8,456 (45.9) | 6,803 (16.6) | < 0.001 |
Women | 62,060 (57.9) | 4,970 (31.0) | 12,870 (40.7) | 9,963 (54.1) | 34,257 (83.4) | |
Charlson comorbidity index | ||||||
0 | 68,931 (64.4) | 9,518 (59.4) | 20,234(64.0) | 11,971 (65.0) | 27,208 (66.3) | < 0.001 |
1 | 24,068 (22.5) | 3,481 (21.7) | 7,060(22.3) | 3,825 (20.8) | 9,702 (23.6) | |
2 | 9,656 (9.0) | 1,885 (11.8) | 2,928(9.3) | 1,747 (9.5) | 3,096 (7.5) | |
≥ 3 | 4,449 (4.2) | 1,136 (7.1) | 1,383(4.4) | 876 (4.8) | 1,054 (2.6) | |
Postoperative length of stay, day, median [IQR] | 21 [15–30] | 18 [14–26] | 20 [15–28] | 27 [21–36] | < 0.001 |