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Table 2 Baseline covariates

From: Assessing responsiveness of the EQ-5D-3L, the Oxford Hip Score, and the Oxford Knee Score in the NHS patient-reported outcome measures

  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)
  1. aNHS PROMs post-operative question of success: Overall, how the problems now in the hip (knee) on which you had surgery, compared to before operation?