Model 4 | Model 5 | Model 6 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
OR | (95% CI) | P | OR | (95% CI) | P | OR | (95% CI) | P | ||
Month of year | January | 1 | 1 | 1 | ||||||
February | 0.991 | (0.918, 1.069) | 0.81 | 0.988 | (0.916, 1.066) | 0.75 | 0.987 | (0.912, 1.069) | 0.75 | |
March | 0.912 | (0.846, 0.984) | 0.017 | 0.911 | (0.844, 0.982) | 0.015 | 0.923 | (0.853, 0.998) | 0.044 | |
April | 0.884 | (0.819, 0.953) | 0.0014 | 0.880 | (0.816, 0.950) | 9.9 × 10–4 | 0.900 | (0.832, 0.973) | 0.0085 | |
May | 0.808 | (0.748, 0.872) | 5.8 × 10–8 | 0.806 | (0.746, 0.871) | 4.4 × 10–8 | 0.818 | (0.755, 0.886) | 8.5 × 10–7 | |
June | 0.776 | (0.717, 0.839) | 2.6 × 10–10 | 0.776 | (0.718, 0.840) | 2.8 × 10–10 | 0.797 | (0.735, 0.864) | 4.5 × 10–8 | |
July | 0.769 | (0.710, 0.832) | 6.9 × 10–11 | 0.770 | (0.712, 0.833) | 9.3 × 10–11 | 0.788 | (0.726, 0.855) | 1.2 × 10–8 | |
August | 0.799 | (0.739, 0.864) | 1.7 × 10–8 | 0.799 | (0.740, 0.864) | 1.7 × 10–8 | 0.819 | (0.755, 0.887) | 1.1 × 10–6 | |
September | 0.862 | (0.798, 0.931) | 1.6 × 10–4 | 0.863 | (0.799, 0.933) | 1.9 × 10–4 | 0.881 | (0.814, 0.955) | 0.0019 | |
October | 0.858 | (0.795, 0.926) | 8.9 × 10–5 | 0.858 | (0.795, 0.926) | 8.7 × 10–5 | 0.876 | (0.809, 0.948) | 0.0011 | |
November | 0.843 | (0.781, 0.911) | 1.4 × 10–5 | 0.843 | (0.781, 0.910) | 1.3 × 10–5 | 0.859 | (0.794, 0.931) | 1.9 × 10–4 | |
December | 0.967 | (0.899, 1.040) | 0.36 | 0.967 | (0.899, 1.040) | 0.36 | 0.987 | (0.916, 1.065) | 0.74 | |
Sunday surgery | MTWTFS surgery | 1 | 1 | 1 | ||||||
Sunday surgery | 1.092 | (1.040, 1.145) | 3.5 × 10–4 | 1.083 | (1.032, 1.137) | 0.0011 | 1.087 | (1.035, 1.142) | 9.3 × 10–4 | |
Out-of-hours surgery | In-hours | 1 | 1 | 1 | ||||||
Out-of-hours | 1.008 | (0.939, 1.082) | 0.83 | 1.011 | (0.942, 1.086) | 0.76 | 1.021 | (0.950, 1.099) | 0.57 | |
Time to surgery ≤ 24 hours | ≤ 24 hours | 1 | 1 | 1 | ||||||
>24 hours | 1.080 | (1.045, 1.116) | 4.0 × 10–6 | 1.088 | (1.053, 1.125) | 4.4 × 10–7 | 1.120 | (1.082, 1.158) | 5.9 × 10–11 |