| BMI | |||||||
---|---|---|---|---|---|---|---|---|
 | =<24.9 | p* | 25–29.9 | p* | =>30 | |||
 | n | % |  | n | % |  | n | % |
Total (978) | 251 | 25.7 | Â | 402 | 41.1 | Â | 325 | 33.1 |
Female | 180 | 71.7 | Â | 255 | 63.4 | Â | 208 | 64.0 |
 | Mean | SD |  | Mean | SD |  | Mean | SD |
Age (in years) | 66.9 | 13.33 | 0.295 | 68.09 | 11.12 | 0.062 | 66.36 | 11.23 |
Educational level | 2.62 | 1.03 | 0.039 | 2.44 | 0.91 | 0.033 | 2.34 | 0.86 |
Duration of OA (in years) | 13.41 | 15.18 | 0.651 | 13.95 | 13.27 | 0.558 | 13.40 | 10.79 |
Amount of comorbidities | 1.69 | 1.283 | <0.001 | 2.19 | 1.73 | <0.001 | 2.72 | 1.86 |
Kellgren score* | 2.26 | 0.68 | 0.044 | 2.53 | 0.92 | 0.038 | 2.76 | 0.77 |