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Table 2 Discharge by timing of mobilisation among patients surgically treated for non-pathological first hip fracture for subgroups defined by dementia, delirium, hypotension, prefracture ambulation and prefracture residence

From: Discharge after hip fracture surgery in relation to mobilisation timing by patient characteristics: linked secondary analysis of the UK National Hip Fracture Database

Mobilisation timing No. of patients No of deathsa No. of live dischargesb Live discharge rate (95% CI)c 30-day CIF, c (95% CI) p-value§ Unadjusted OR of CIF (95% CI) Adjusted OR of CIF (95% CI)d
patients with dementia
Overall 34,253 17,083 2171 31.9 (31.4–32.4) 630 (624–636)    
Mobilised late 9443 4179 992 26.8 (26–27.6) 545 (534–557)   1.00 1.00
Mobilised early 24,810 12,904 1179 34 (33.4–34.6) 664 (656–671) < 0.001 1.72 (1.62–1.82) 1.83 (1.70–1.97)
patients without dementia
Overall 80,442 43,017 2683 42.4 (42.0–42.8) 749 (745–753)    
Mobilised late 14,700 5874 1179 26.2 (25.5–26.9) 574 (564–585)   1.00 1.00
Mobilised early 65,742 37,143 1504 46.9 (46.5–47.4) 791 (787–795) < 0.001 2.67 (2.57–2.77) 2.28 (2.17–2.39)
patients with delirium
Overall 9818 4010 775 23.9 (23.2–24.7) 537 (526–549)    
Mobilised late 2746 929 336 19 (17.8–20.3) 436 (414–458)   1.00 1.00
Mobilised early 7072 3081 439 26 (25.1–26.9) 578 (564–592) < 0.001 1.94 (1.72–2.19) 1.84 (1.59–2.13)
patients without delirium
Overall 104,877 56,090 4079 40.6 (40.2–40.9) 727 (723–730)    
Mobilised late 21,397 9124 1835 27.5 (27–28.1) 578 (57–587)   1.00 1.00
Mobilised early 83,480 46,966 2244 44.7 (44.2–45.1) 768 (764–772) < 0.001 2.40 (2.32–2.48) 2.16 (2.07–2.26)
patients with hypotension
Overall 10,123 4425 759 28.1 (27.3–28.9) 599 (587–611)    
Mobilised late 2825 939 391 19.9 (18.7–21.2) 448 (426–47)   1.00 1.00
Mobilised early 7298 3486 368 31.5 (30.5–32.6) 661 (647–675) < 0.001 2.39 (2.14–2.66) 2.11 (1.85–2.42)
patients without hypotension
Overall 104,572 55,675 4095 40.0 (39.6–40.3) 720 (716–723)    
Mobilised late 21,318 9114 1780 27.4 (26.8–27.9) 576 (568–584)   1.00 1.00
Mobilised early 83,254 46,561 2315 43.9 (43.5–44.3) 76 (756–763) < 0.001 2.36 (2.28–2.44) 2.12 (2.03–2.22)
patients with indoor ambulation only prefracture
Overall 30,834 14,200 2189 30.2 (29.7–30.7) 611 (604–618)    
Mobilised late 9171 3742 1099 25.1 (24.3–25.9) 523 (511–535)   1.00 1.00
Mobilised early 21,663 10,458 1090 32.6 (32.0–33.2) 651 (643–659) < 0.001 1.82 (1.72–1.93) 1.78 (1.65–1.92)
patients with outdoor ambulation prefracture
Overall 100,983 55,344 3265 42.5 (42.1–42.8) 746 (743–750)    
Mobilised late 18,064 7696 1312 27.6 (27–28.2) 588 (579–597)   1.00 1.00
Mobilised early 82,919 47,648 1953 46.5 (46.1–47.0) 784 (780–787) < 0.001 2.48 (2.4–2.57) 2.28 (2.18–2.4)
patients admitted from residential care
Overall 23,588 16,252 1428 50.5 (49.7–51.2) 779 (773–784)    
Mobilised late 7065 4448 674 42.7 (41.4–43.9) 707 (696–719)   1.00 1.00
Mobilised early 16,523 11,804 754 54.2 (53.2–55.2) 810 (803–817) < 0.001 1.68 (1.59–1.79) 1.64 (1.51–1.77)
patients admitted from home
Overall 107,144 53,284 3938 37.3 (37.0–37.6) 700 (696–703)    
Mobilised late 19,779 6977 1694 22.1 (21.6–22.6) 512 (530–521)   1.00 1.00
Mobilised early 87,365 46,307 2244 41.6 (41.2–42.0) 746 (742–749) < 0.001 2.85 (2.75–2.96) 2.30 (2.19–2.41)
  1. Abbreviations: CIF Cumulative incidence function, CI Confidence interval, OR Odds ratio
  2. aAt 30 days from surgery bAt 30 days from surgery cPer 1000 patient–days. § Pepe-Mori test p-value. Two–sample test compared to mobilised 2 days or more after surgery dAdjusted for age, sex, ethnicity, fracture type, calendar period of admission, timing of surgery, comorbidity (in each subgroup analysis by hypotension, dementia, delirium the corresponding variable is excluded from the adjustment), prefracture residence (except for analysis by prefracture residence subgroup), prefracture ambulation (except for the analysis by prefracture ambulation subgroup), procedure type, day of admission and hospital volume. CIF regression at in-patient days 3, 4, 6, 8, 12, 16, 20, 24, and 30. Results based on a subset of patients with known information for adjustment variables. The analysis of patients with imputation for missing values in adjustment variables is available in supplementary file 4