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Table 1 Population characteristics

From: Access to hip and knee replacement surgery in patients with chronic diseases according to patient-reported pain and functional status

Characteristic Hip replacement Knee replacement
No. of patient 312,079 (48.7) 328,753 (51.3)
Mean (SD) OHS or OKS 17.4 (8.25) 18.3 (7.87)
Mean (SD) EQ-5D 0.33 (0.33) 0.39 (0.32)
Long-standing problems, n (%) 57,827 (18.5) 141,559 (43.1)
Age, mean (range) 68 (18–105) 69 (18–102)
Gender, n (%)
 Male 126,925 (40.7) 140,971 (42.9)
 Female 184,982 (59.3) 187,525 (57.0)
Missing, not stated 172 257
Socioeconomic status by quintile group, n (%)
 1 (least deprived) 74,380 (23.4) 69,582 (21.2)
 2 76,164 (24.4) 74,799 (22.8)
 3 55,793 (17.9) 62,851 (19.1)
 4 52,194 (16.7) 60,177 (18.3)
 5 (most deprived) 50,408 (16.2) 58,327 (17.7)
Missing 3140 3017
Ethnicity, n (%)
 White or White British 271,959 (98.3) 279,159 (94.5)
 Mixed background 546 (0.19) 836 (0.28)
 Asian or Asian British 1239 (0.45) 10,445 (3.53)
 Black or Black British 1703 (0.62) 3347 (1.13)
 Chinese or other ethnic 1150 (0.42) 1706 (0.58)
Missing 35,482 33,260
Chronic disease, n (%)
 Heart disease 53,277 (17.1) 60,755 (18.5)
 High Blood pressure 151,163 (48.4) 187,815 (57.1)
 Stroke 3227 (1.03) 3530 (1.07)
 Leg pain due to poor circulation 5140 (1.65) 4955 (1.51)
 Lung Disease 43,481 (13.9) 51,176 (15.6)
 Diabetes 29,535 (9.46) 44,813 (13.6)
 Kidney Disease 16,428 (5.26) 18,000 (5.48)
 Diseases of the Nervous System 8483 (2.72) 9741 (2.96)
 Liver Disease 1888 (0.60) 1931 (0.59)
 Cancer 6354 (2.04) 5545 (1.69)
 Depression 13,367 (4.28) 14,814 (4.51)
Count of chronic diseases, n (%)
 0 113,479 (36.4) 94,290 (28.7)
 1 107,139 (34.3) 119,012 (36.2)
 2 59,976 (19.2) 75,202 (22.9)
 3 22,929 (7.35) 29,761 (9.05)
 4+ 8556 (2.74) 10,488 (3.19)