Person-years | No. of cases | Incidence rate (per 100 person-years) | Crude HR (95% CI) | Model 1 HR (95% CI) | Model 2 HR (95% CI) | Model 3 HR (95% CI) | |
---|---|---|---|---|---|---|---|
Late presentation | 954.1 | 274 | 28.7 | 2.08 (1.69, 2.56) | 1.99 (1.61, 2.46) | 1.94 (1.57. 2.41) | 1.76 (1.42. 2.18) |
Irregular visits | 1346.7 | 283 | 21.0 | 1.52 (1.24, 1.86) | 1.49 (1.21, 1.82) | 1.44 (1.17, 1.76) | 1.31 (1.06, 1.61) |
Regular visits | 933.3 | 128 | 13.7 | Reference | Reference | Reference | Reference |
p value | <.001 | <.001 | <.001 | <.001 |