Specific disease morbidity counts by age, sex, and social class for cases and control groups
| OA cases (n = 11375) | Non-OA controls (n = 11780) | |||||||
|---|---|---|---|---|---|---|---|---|
| Single | Low (2 or 3) | Medium (4 or 5) | High (6 or more) | Single | Low (2 or 3) | Medium (4 or 5) | High (6 or more) | |
| Figures in brackets are percentage of each respective category. | ||||||||
| Sex | ||||||||
| Male | 612 (16) | 1305 (33) | 988 (25) | 1015 (26) | 972 (24) | 1571 (38) | 877 (21) | 698 (17) |
| Female | 865 (12) | 2173 (29) | 1922 (26) | 2495 (33) | 1493 (19) | 2661 (35) | 1766 (23) | 1742 (23) |
| Age | ||||||||
| 50–64 | 595 (14) | 1347 (32) | 1075 (25) | 1241 (29) | 1074 (24) | 1677 (37) | 952 (21) | 801 (18) |
| 65–74 | 479 (14) | 1091 (31) | 889 (25) | 1057 (30) | 781 (21) | 1327 (36) | 857 (23) | 743 (20) |
| 75–84 | 329 (12) | 812 (29) | 730 (26) | 932 (33) | 471 (17) | 968 (34) | 656 (23) | 721 (26) |
| 85+ | 74 (9) | 228 (29) | 216 (27) | 280 (35) | 139 (18) | 260 (35) | 178 (24) | 175 (23) |
| Social class | ||||||||
| I/II | 325 (14) | 750 (32) | 591 (25) | 692 (29) | 650 (22) | 1093 (37) | 687 (23) | 552 (18) |
| IIIN/M | 589 (13) | 1444 (31) | 1182 (25) | 1426 (31) | 885 (19) | 1633 (36) | 1045 (23) | 1016 (22) |
| IV/V | 355 (12) | 827 (28) | 774 (27) | 951 (33) | 493 (20) | 857 (35) | 561 (22) | 565 (23) |
| Other | 94 (10) | 262 (30) | 223 (26) | 295 (34) | 167 (19) | 320 (36) | 201 (23) | 199 (22) |
| Unknown | 114 (19) | 195 (33) | 140 (23) | 146 (25) | 270 (32) | 329 (38) | 149 (17) | 108 (13) |
| Total | 1477 (13) | 3478 (30) | 2910 (26) | 3510 (31) | 2465 (21) | 4232 (36) | 2643 (22) | 2440 (21) |