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Table 6 Rate of falls (number of falls per 1000 occupied bed days) at each facility

From: Increasing the uptake of vitamin D supplement use in Australian residential aged care facilities: results from the vitamin D implementation (ViDAus) study

  Overall Wedge 1 Wedge 2 Wedge 1 vs. Wedge 2
Mean (Range) Mean
(Range)
Mean
(Range)
Unadjusted p value for raw differencea Adjusted for baselinea
Audit 1:
6 months pre-baseline
5.6 (2.1–12.5) 4.9 6.1 p = 0.092  
Audit 2:
Baseline to 6 months
6.4 (1.7–12.9) 5.4 7.1 p = 0.095 p = 0.4
Audit 3:
6 to 12 months
6.7 (1.7–12.9) 6.1 7.1 p = 0.3 p = 0.6
Audit 4:
12 to 18 months
7.0 (1.9–18.0) 5.8 7.7 p = 0.082 p = 0.7
Pre-intervention Period (Wedge 1: Audit 1; Wedge 2: Audits 1 + 2) 5.8 (2.1–12.7) 4.9
(2.7–9.2)
6.5
(2.1–12.7)
  
Post Intervention Period (Wedge 1: Audits 3 + 4; Wedge 2: Audit 4) 6.7 (2.2–14.6) 5.8
(2.3–10.0)
7.4
(2.2–14.6)
  
  Mean Change
(signed rank test p value)
Kruskal-Wallis p value for difference between wedges
Change Post Intervention vs. Pre-Intervention 0.9 (p = 0.015) 0.8 (p = 0.14) 0.9 (p = 0.05) p = ~ 1
  1. aNegative binomial model used for fall rates per occupied bed days due to overdispersion in the Poisson model. Adjustment for baseline was achieved using a longitudinal GEE model with autoregressive correlation