Clinical morbidity other than OA, classified by the main Read code chapters compared between case and control groups
| Read chapter description | OA cases No (%) | Non-OA controls No (%) | OR* (99% CI) | OR† (99% CI) | |
|---|---|---|---|---|---|
| Bold indicates statistically significant at 1% level. | |||||
| *Adjusted for age, sex, and social class; non-OA group is reference group; †adjusted for age, sex, social class, and number of other broad disease groups for which subjects consulted; non-OA group is reference group; ‡excluding N05. | |||||
| A | Infectious and parasitic diseases | 1248 (11.0) | 1176 (10.0) | 1.11 (0.99 to 1.24) | 1.00 (0.89 to 1.12) |
| B | Neoplasms | 517 (4.5) | 547 (4.6) | 0.98 (0.83 to 1.16) | 0.92 (0.78 to 1.09) |
| C | Endocrine disorders | 1393 (12.2) | 1188 (10.1) | 1.23 (1.11 to 1.38) | 1.18 (1.06 to 1.32) |
| D | Haematological diseases | 345 (3.0) | 279 (2.4) | 1.27 (1.03 to 1.57) | 1.15 (0.93 to 1.43) |
| E | Mental disorders | 1680 (14.8) | 1512 (12.8) | 1.16 (1.05 to 1.28) | 1.04 (0.94 to 1.15) |
| F | Central nervous system disorders | 3146 (27.7) | 2910 (24.7) | 1.16 (1.07 to 1.25) | 1.10 (1.02 to 1.19) |
| G | Circulatory system diseases | 4109 (36.1) | 3704 (31.4) | 1.22 (1.13 to 1.31) | 1.19 (1.11 to 1.28) |
| H | Respiratory system diseases | 4143 (36.4) | 3932 (33.4) | 1.13 (1.05 to 1.21) | 1.07 (0.99 to 1.15) |
| J | Digestive system diseases | 2517 (22.1) | 1890 (16.0) | 1.47 (1.35 to 1.60) | 1.33 (1.21 to 1.45) |
| K | Genitourinary system diseases | 1752 (15.4) | 1587 (13.5) | 1.17 (1.06 to 1.29) | 1.07 (0.97 to 1.19) |
| M | Skin and subcutaneous tissue diseases | 2293 (20.2) | 1952 (16.6) | 1.26 (1.15 to 1.38) | 1.16 (1.06 to 1.27) |
| N‡ | Musculoskeletal and connective tissue diseases | 4099 (36.0) | 2795 (23.7) | 1.80 (1.67 to 1.94) | 1.73 (1.60 to 1.86) |
| P | Congenital anomalies | 79 (0.7) | 77 (0.7) | 1.06 (0.70 to 1.61) | 0.97 (0.64 to 1.48) |
| R | Symptoms and signs | 3050 (26.8) | 2533 (21.5) | 1.32 (1.22 to 1.43) | 1.18 (1.08 to 1.28) |
| S | Injury and poisoning | 2608 (22.9) | 2032 (17.2) | 1.42 (1.30 to 1.54) | 1.16 (1.06 to 1.27) |
| T | Causes of injury and poisoning | 2369 (20.8) | 1896 (16.1) | 1.36 (1.25 to 1.49) | 1.09 (0.99 to 1.20) |