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Table 1 Descriptives of the study population (N = 6810), predictors, crude and adjusted odds ratios (OR) with 95% confidence intervals (95% CI)
| Predictor | Mean (SD) | Group | % | Crude OR (95% CI) | Adjusted OR (95% CI) |
|---|---|---|---|---|---|
| Time | n.a. | 0 month | n.a. | 1.00 | 1.00 |
| 3 month | n.a | 0.83 (0.77–0.88) | 0.78 (0.72–0.84) | ||
| 12 month | n.a | 1.07 (1.00–1.15) | 1.10 (1.02–1.19) | ||
| Age | 65 (9) | 22–54 years | 1.00 | 1.00 | |
| 55–64 years | 0.75 (0.65–0.85) | 0.74 (0.64–0.85) | |||
| 65–74 years | 0.50 (0.44–0.57) | 0.47 (0.42–0.54) | |||
| 75–100 year | 0.78 (0.67–0.91) | 0.64 (0.55–0.75) | |||
| Charnley categorya | n.a. | A | 35 | 1.00 | 1.00 |
| B | 31 | 1.05 (0.94–1.17) | 1.00 (0.90–1.11) | ||
| C | 33 | 1.38 (1.25–1.53) | 1.15 (1.04–1.28) | ||
| BMI | 28 (5) | Normal weight | 1.00 | 1.00 | |
| Overweight | 1.39 (1.25–1.56) | 1.27 (1.14–1.42 | |||
| Obesity | 2.36 (2.10–2.65) | 1.93 (1.71–2.17) | |||
| Gender | n.a. | Man | 27 | 1.00 | 1.00 |
| Woman | 73 | 0.80 (0.73–0.88) | 0.69 (0.62–0.75) |
