Table 2 Basic characteristics of the cohort of 315,495 Norwegian men and women
| Â | Men | Women |
|---|---|---|
No. of participants | 153,795 | 161,700 |
No. of knee replacements for primary OA | 430 | 893 |
BMI at screeening* | 25.4 (3.2) | 24.3 (4.0) |
Age at screening years* | 43.1 (7.2) | 43.0 (7.3) |
Age at start follow up years* | 46.8 (7.6) | 46.7 (7.6) |
Age at operation* | 62.8 (8.7) | 64.4 (9.0) |
Age at end follow up years* | 58.7 (6.9) | 58.9 (7.3) |