Table 2 Baseline covariates
Hip | Knee | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total | Patients' self-assessed transition levela | Total | Patients' self-assessed transition level | ||||||||||
Much better | A little better | About the same | A little worse | Much worse | Much better | A little better | About the same | A little worse | Much worse | ||||
Age | N | 181,423 | 155,899 | 15,565 | 3890 | 2382 | 1633 | 191,379 | 138,407 | 31,650 | 8985 | 7029 | 4610 |
Mean (SD) | 68.0 (10.5) | 68.0 (10.4) | 68.1 (11.2) | 69.3 (10.9) | 68.4 (10.8) | 67.0 (11.1) | 69.3 (8.9) | 69.7 (8.7) | 68.7 (9.2) | 68.4 (9.5) | 67.4 (9.2) | 65.9 (9.5) | |
Min, Max | (13, 100) | (13, 100) | (16, 98) | (16, 95) | (19, 97) | (16, 92) | (16, 102) | (16, 102) | (21, 100) | (26, 95) | (33, 95) | (28, 96) | |
Gender | Male | 74,907 (41.3) | 65,067 (41.7) | 5927 (38.1) | 1535 (39.5) | 902 (37.9) | 642 (39.3) | 84,219 (44.0) | 61,226 (44.2) | 13,349 (42.2) | 4007 (44.6) | 3270 (46.5) | 2118 (45.9) |
Female | 106,493 (58.7) | 90,810 (58.3) | 9637 (61.9) | 2356 (60.6) | 1479 (62.1) | 991 (60.7) | 107,127 (56.0) | 77,162 (55.8) | 18,290 (57.8) | 4977 (55.4) | 3757 (53.5) | 2492 (54.1) | |
Comorbidity | Heart disease | 16,906 (9.3) | 13,876 (8.9) | 1765 (11.3) | 517 (13.3) | 292 (12.3) | 218 (13.4) | 20,100 (10.5) | 13,583 (9.8) | 3778 (11.9) | 1135 (12.6) | 920 (13.1) | 610 (13.2) |
High blood pressure | 71,267 (39.3) | 60,621 (38.9) | 6573 (42.2) | 1656 (42.6) | 973 (40.9) | 650 (39.8) | 88,549 (46.3) | 63,700 (46.0) | 15,181 (48.0) | 4152 (46.2) | 3177 (45.2) | 2033 (44.1) | |
Stroke | 2432 (1.3) | 1931 (1.2) | 275 (1.8) | 86 (2.2) | 56 (2.4) | 52 (3.2) | 3130 (1.6) | 2001 (1.5) | 644 (2.0) | 192 (2.1) | 168 (2.4) | 107 (2.3) | |
Circulation | 9866 (5.4) | 7317 (4.7) | 1532 (9.8) | 429 (11.0) | 259 (10.9) | 187 (11.5) | 13,438 (7.0) | 7994 (5.8) | 3184 (10.1) | 950 (10.6) | 756 (10.8) | 494 (10.7) | |
Lung disease | 13,542 (7.5) | 11,138 (7.1) | 1443 (9.3) | 361 (9.3) | 253 (10.6) | 203 (12.4) | 16,165 (8.5) | 11,118 (8.0) | 2933 (9.3) | 865 (9.6) | 695 (9.9) | 491 (10.7) | |
Diabetes | 15,816 (8.7) | 12,939 (8.3) | 1728 (11.1) | 503 (12.9) | 288 (12.1) | 185 (11.3) | 23,696 (12.4) | 15,582 (11.3) | 4683 (14.8) | 1387 (15.4) | 1190 (16.9) | 765 (16.6) | |
Kidney | 3029 (1.7) | 2502 (1.6) | 338 (2.2) | 77 (2.0) | 41 (1.7) | 26 (1.6) | 3423 (1.8) | 2352 (1.7) | 635 (2.0) | 180 (2.0) | 150 (2.1) | 90 (2.0) | |
Nervous system | 1342 (0.7) | 1086 (0.7) | 151 (1.0) | 34 (0.9) | 29 (1.2) | 17 (1.0) | 1845 (1.0) | 1253 (0.9) | 321 (1.0) | 103 (1.2) | 88 (1.3) | 72 (1.6) | |
Liver disease | 929 (0.5) | 768 (0.5) | 94 (0.6) | 31 (0.8) | 13 (0.6) | 14 (0.9) | 997 (0.5) | 636 (0.5) | 206 (0.7) | 64 (0.7) | 53 (0.8) | 33 (0.7) | |
Cancer | 8767 (4.8) | 7431 (4.8) | 811 (5.2) | 212 (5.5) | 115 (4.8) | 90 (5.5) | 9062 (4.7) | 6571 (4.8) | 1446 (4.6) | 450 (5.0) | 355 (5.1) | 206 (4.5) | |
Depression | 13,252 (7.3) | 10,247 (6.6) | 1821 (11.7) | 485 (12.5) | 302 (12.7) | 245 (15.0) | 15,823 (8.3) | 9693 (7.0) | 3419 (10.8) | 1073 (11.9) | 894 (12.7) | 680 (14.8) | |
Arthritis | 132,251 (72.9) | 112,840 (72.4) | 11,905 (76.5) | 2953 (75.9) | 1808 (75.9) | 1243 (76.1) | 151,394 (79.1) | 108,910 (78.7) | 25,624 (81.0) | 7155 (79.6) | 5508 (78.4) | 3645 (79.1) | |
Comorbidity group | 0 | 24,945 (13.8) | 22,049 (14.1) | 1724 (11.1) | 451 (11.6) | 277 (11.6) | 179 (11.0) | 17,712 (9.3) | 13,345 (9.6) | 2474 (7.8) | 792 (8.8) | 625 (8.9) | 419 (9.1) |
1 | 69,249 (38.2) | 61,012 (39.1) | 5016 (32.2) | 1197 (30.8) | 752 (31.6) | 500 (30.6) | 63,804 (33.3) | 47,914 (34.6) | 9611 (30.4) | 2599 (28.9) | 2067 (29.4) | 1356 (29.4) | |
2 | 54,889 (30.3) | 46,929 (30.1) | 4957 (31.9) | 1185 (30.5) | 711 (29.9) | 484 (29.6) | 64,663 (33.8) | 47,306 (34.2) | 10,553 (33.3) | 2973 (33.1) | 2201 (31.3) | 1421 (30.8) | |
3+ | 32,341 (17.8) | 25,909 (16.6) | 3868 (24.9) | 1058 (27.2) | 642 (27.0) | 470 (28.8) | 45,200 (23.6) | 29,842 (21.6) | 9012 (28.5) | 2621 (29.2) | 2136 (30.4) | 1414 (30.7) | |
Years of NHS PROMs | 2009–2011 | 82,472 (45.5) | 69,847 (44.8) | 7498 (48.2) | 1892 (48.6) | 1120 (47.0) | 801 (49.1) | 87,809 (45.9) | 62,121 (44.9) | 15,316 (48.4) | 4331 (48.2) | 3378 (48.1) | 2305 (50.0) |
2012–2015 | 98,952 (54.5) | 86,052 (55.2) | 8067 (51.8) | 1999 (51.4) | 1262 (53.0) | 832 (51.0) | 103,570 (54.1) | 76,286 (55.1) | 16,334 (51.6) | 4654 (51.8) | 3651 (51.9) | 2305 (50.0) | |