Model including walking and physically active term
| Variable | Logistic model coefficient (ln (OR)) | Odds ratio (95% CI) | p Value |
| Walking time period 2 | 0.416 | 1.52 (0.95 to 2.43) | 0.083 |
| Lot of exercise age 20–24 | 0.469 | 1.60 (0.94 to 2.73) | 0.085 |
| Knee injury | 1.895 | 6.66 (1.29 to 34.46) | 0.024 |