Characteristics | Control | OAK | Pvalue |
---|---|---|---|
Mean age (SD), years | 65 (8.7) | 65 (7.9) | Â |
Gender (M:F) | 23:52 | 14:57 | Â |
Socioeconomic index by post code [27] in quintiles, n (%) | Â | Â | |
   Top 25% | 43 (57) | 46 (65) |  |
   50% to 75% | 10 (13) | 9 (13) |  |
   25% to 50% | 6 (8) | 8 (11) |  |
   10% to 25% | 11 (15) | 6 (8) |  |
   Bottom 10% | 5 (7) | 2 (3) |  |
Coexisting disease, n (%)a | Â | Â | |
   Total number | 156 | 156 |  |
   Cardiovascular | 48 (64) | 56 (79) |  |
   Gastrointestinal | 17 (22) | 21 (29) |  |
   Musculoskeletal (other than knee OA) | 32 (43) | 12 (17) |  |
   Mental health | 6 (8) | 7 (10) |  |
   Endocrine | 18 (24) | 13 (18) |  |
   Osteoporosis | 8 (11) | 8 (11) |  |
   Other | 27 (36) | 39 (55) |  |
   None | 9 people (12%) | 6 people (8.5%) |  |
   Multiple coexisting diseases | 49 people (65%) | 43 people (60%) |  |
   Mean (SD) incidence per person | 2.39 (1.4) | 2.43 (1.65) |  |
SF-36b | Â | Â | Â |
   Physical function | 43.98 (21.2) | 50.41 (22.2) | 0.078 |
   Role physical | 28.38 (36.6) | 40.00 (39.7) | 0.070 |
   Body pain | 42.00 (19.1) | 49.73 (19.0) | 0.016 |
   General health | 64.81 (17.2) | 65.05 (18.4) | 0.936 |
   Vitality | 52.70 (21.0) | 55.86 (16.4) | 0.321 |
   Social function | 69.43 (26.1) | 75.54 (22.1) | 0.133 |
   Role emotional | 57.66 (43.1) | 66.19 (42.6) | 0.235 |
   Mental health | 74.92 (15.1) | 75.94 (14.8) | 0.683 |
   WOMAC pain | 8.00 (3.6) | 6.53 (3.7) | 0.020 |