Approach | Minimally invasive procedure used | Number for analysis | (i) Unadjusted model (n = 723,747; 2673 deaths) hazard rate ratio [95%CI] | (ii) With covariate adjustment for sex, age, ASA and year of primary, stratified by ‘risk group’ (n = 723,747; 2673 deaths) hazard rate ratio [95%CI] | (iii) With covariate adjustment for sex, age, ASA, year of primary and fixation, stratified by ‘risk group’ (n = 723,747; 2673 deaths) hazard rate ratio [95%CI] |
Posterior | No | 394,655 | 1 [referent] | 1 [referent] | 1 [referent] |
Posterior | Yes | 22,655 | 0.80 [0.62–1.04] P = 0.101 | 0.88 [0.68–1.14] P = 0.344 | 0.90 [0.69–1.17] P = 0.447 |
Lat/Ant-Lat/Hard | No | 260,353 | 1.38 [1.27–1.49] P < 0.001 | 1.14 [1.05–1.24] P = 0.002 | 1.14 [1.05–1.23] P = 0.002 |
Lat/Ant-Lat/Hard | Yes | 9099 | 1.21 [0.87–1.69] P = 0.252 | 1.02 [0.73–1.43] P = 0.896 | 1.03 [0.74–1.44] P = 0.847 |
Ant/Other | No | 26,578 | 1.03 [0.83–1.28] P = 0.793 | 0.96 [0.77–1.19] P = 0.703 | 0.96 [0.77–1.19] P = 0.715 |
Ant/Other | Yes | 3829 | 0.80 [0.43–1.50] P = 0.493 | 0.88 [0.47–1.65] P = 0.697 | 0.91 [0.49–1.71] P = 0.780 |
Trans-trochanteric | No | 6578 | 1.49 [1.05–2.11] P = 0.026 | 1.19 [0.83–1.69] P = 0.342 | 1.16 [0.81–1.65] P = 0.412 |
Additional pairwise comparisons: | |||||
Lat/Ant-Lat/Hard | No vs. Yes | P = 0.452 | P = 0.517 | P = 0.573 | |
Ant/Other | No vs. Yes | P = 0.460 | P = 0.807 | P = 0.884 | |
Approach | Minimally invasive procedure used | (iv) With covariate adjustment for sex, age, ASA, year of primary, fixation, mechanical and chemical thromboprophylaxis and anaesthetic group, stratified by ‘risk group’ (n = 713,994 with complete information; 2621 deaths) hazard rate ratio [95%CI] | (v) With covariate adjustment for sex, age, ASA, year of primary, fixation, mechanical and chemical thromboprophylaxis, anaesthetic group and quintile of area deprivation, stratified by ‘risk group’ (n = 572,719 with complete information; 2192 deaths) hazard rate ratio [95%CI] | (vi) With covariate adjustment for sex, age, ASA, year of primary, fixation, mechanical and chemical thromboprophylaxis, anaesthetic group, quintile of area deprivation and BMI subgroup, stratified by ‘risk group’ (n = 359,883 with complete information; 1148 deaths) hazard rate ratio [95%CI] | |
Posterior | No | 1 [referent] | 1 [referent] | 1 [referent] | |
Posterior | Yes | 0.91 [0.70–1.18] P = 0.475 | 0.93 [0.68–1.27] P = 0.644 | 0.87 [0.57–1.34] P = 0.525 | |
Lat/Ant-Lat/Hard | No | 1.16 [1.06–1.26] P = 0.001 | 1.11 [1.01–1.21] P = 0.027 | 1.15 [1.01–1.30] P = 0.029 | |
Lat/Ant-Lat/Hard | Yes | 0.91 [0.63–1.31] P = 0.605 | 0.87 [0.58–1.31] P = 0.512 | 0.80 [0.41–1.55] P = 0.507 | |
Ant/Other | No | 0.96 [0.78–1.20] P = 0.732 | 0.94 [0.75–1.19] P = 0.620 | 0.89 [0.63–1.26] P = 0.509 | |
Ant/Other | Yes | 0.92 [0.49–1.71] P = 0.787 | 1.23 [0.61–2.47] P = 0.563 | 1.01 [0.32–3.15] P = 0.986 | |
Trans-trochanteric | No | 1.16 [0.81–1.67] P = 0.409 | 1.12 [0.75–1.68] P = 0.571 | 1.12 [0.52–2.41] P = 0.771 | |
Additional pairwise comparisons: | |||||
Lat/Ant-Lat/Hard | No vs Yes | P = 0.195 | P = 0.250 | P = 0.283 | |
Ant/Other | No vs Yes | P = 0.885 | P = 0.447 | P = 0.833 |