Skip to main content

Table 4 Multivariate adjusted models investigating the association between time of surgery and mortality at 30 days. Models adjusted for non-surgical interventions (Model 4) N (multiple imputation) = 241,446, non-surgical interventions and surgical treatments (Model 5) N (multiple imputation) = 241,446, non-surgical interventions, surgical treatments and Index of Multiple Deprivation (Model 6) N = 225,324

From: The association between the day of the week of milestones in the care pathway of patients with hip fracture and 30-day mortality: findings from a prospective national registry – The National Hip Fracture Database of England and Wales

   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
  1. Model 3 = Pre-admission characteristics + Non-surgical interventions; Model 4 = Model 3 + Surgical Treatments; Model 5 = Model 4 + Index of Multiple Deprivation
  2. Pre-admission characteristics = Fracture type, ASA, AMTS, Pathology, Mobility; Non-surgical interventions = Falls Assessment, MDT meeting; Surgical interventions = anaesthetic type, operation type; Index of Multiple Deprivation = Index of Multiple Deprivation Older People England, Index of Multiple Deprivation Older People Wales; Omnibus Wald test for: month of admission (Models 4) P = 1.0 × 10–16; (Models 5) P = 1.0 × 10–16 (Model 6) P = 7.9 × 10–15
  3. MTWTFS Monday, Tuesday, Wednesday, Thursday, Friday, Saturday; OR odds ratio; CI Confidence Interval