Quartiles of DRRD score | Number of cases | Person-years | Incidence rate per 1000 person-years (95% confidence interval) | Hazard ratio (95% confidence interval) | ||
---|---|---|---|---|---|---|
Unadjusted | Model 1a | Model 2b | ||||
Quartile 1 (9–23) | 162 | 243,233.1 | 0.67 (0.57, 0.78) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Quartile 2 (24–27) | 133 | 256,240.4 | 0.52 (0.44, 0.62) | 0.78 (0.62, 0.98) | 0.81 (0.64, 1.02) | 0.85 (0.68, 1.08) |
Quartile 3 (28–30) | 73 | 175,613.0 | 0.42 (0.33, 0.52) | 0.62 (0.47, 0.82) | 0.68 (0.52, 0.90) | 0.75 (0.57, 1.00) |
Quartile 4 (31–45) | 78 | 224,251.0 | 0.35 (0.28, 0.43) | 0.52 (0.40, 0.68) | 0.61 (0.46, 0.80) | 0.71 (0.54, 0.94) |
Ptrend |  |  |  |  < 0.001 |  < 0.001 | 0.008 |