Skip to main content

Table 2 Rates, adjusted rate ratios and association of outcomes between the best and worst performers within hospital peer groups

From: Incidences and variations of hospital acquired venous thromboembolism in Australian hospitals: a population-based study

Hospital peer group Hospital HA-VTE HA-VTE case fatality Correlation coefficient
n Lowest (IR) Highest (IR) IRR (95 % CI) Lowest (%) Highest (%) IRR (95 % CI) (95 % CI)
All admissions
Public hospitals
 Principal referral (A1) 17 11.0 22.9 2.09 (2–2.19) b 7.7 % 13.8 % 1.93 (1.64–2.27) b −0.38 (-0.76–0.19)  
 Major metro- & non-metropolitan (B) 22 6.8 12.6 1.70 (1.58–1.84) b 6.9 % 15.0 % 2.13 (1.73–2.63) b −0.22 (-0.59–0.22)  
 District group 1 (C1) 13 5.8 11.7 2.02 (1.77–2.31) b 5.9 % 20.5 % 3.77 (2.41–5.91) b −0.35 (-0.76–0.25)  
 District group 2 (C2) 30 2.8 10.4 2.94 (2.39–3.62) b 4.7 % 14.7 % 3.47 (1.94–6.19) b 0.04 (-0.33–0.39)  
Private hospitals
 Major (21) 10 4.0 24.7 5.33 (4.62–6.16) b 1.4 % 10.5 % 6.23 (4.25–9.13) b −0.63 (-0.9–0.01) a
 District (22) 12 6.0 14.3 2.44 (2.05–2.9) b 2.8 % 12.3 % 5.72 (3.1–10.58) b −0.82 (-0.95–0.46) b
Medical admissions
Public hospitals
 Principal referral (A1) 17 3.3 7.6 2.24 (1.75–2.87) b 1.3 % 18.3 % 15.65 (3.73–65.58) b −0.08 (-0.61–0.49)  
 Major metro- & non-metropolitan (B) 22 2.3 4.5 2.03 (1.59–2.58) b 0.0 % 20.1 %     0.29 (-0.15–0.63)  
 District group 1 (C1) 13 1.5 5.5 4.32 (2.72–6.86) b 4.0 % 20.0 % 5.81 (1.58–21.41) b −0.36 (-0.76–0.23)  
 District group 2 (C2) 30 2.3 7.0 3.65 (2.64–5.06) b 0.0 % 27.8 %     −0.13 (-0.47–0.24)  
Private hospitals
 Major (21) 10 5.1 13.6 2.52 (1.48–4.29) b 1.1 % 20.0 %     0.32 (-0.39–0.79)  
 District (22) 12 3.6 12.9 3.88 (2.55–5.92) b 4.6 % 16.7 % 2.57 (0.66–9.97)   −0.67 (-0.9–0.16) a
Surgical admissions
Public hospitals
 Principal referral (A1) 17 11.8 25.0 2.12 (2.02–2.22) b 8.9 % 14.0 % 1.74 (1.52–1.99) b −0.38 (-0.76–0.19)  
 Major metro- & non-metropolitan (B) 22 7.9 14.3 1.74 (1.61–1.88) b 7.2 % 14.7 % 2.01 (1.62–2.49) b −0.21 (-0.58–0.23)  
 District group 1 (C1) 13 7.2 13.7 1.88 (1.63–2.16) b 5.8 % 20.8 % 4.11 (2.5–6.75) b −0.30 (-0.73–0.3)  
 District group 2 (C2) 30 2.9 14.7 3.75 (2.83–4.98) b 3.8 % 14.9 % 4.37 (2.06–9.26) b 0.05 (-0.32–0.4)  
Private hospitals
 Major (21) 10 3.6 25.0 6.07 (5.2–7.09) b 1.7 % 11.2 % 5.88 (3.77–9.18) b −0.36 (-0.81–0.35)  
 District (22) 12 5.9 11.8 2.37 (1.99–2.81) b 2.2 % 11.3 % 6.88 (3.24–14.62) b −0.72 (-0.92–0.25) b
  1. Incidence rates (IR) are crude and reported per 1000 patients
  2. Incidence rate ratios (IRR) and related confident intervals (CI) were obtained using Poisson mixed models and adjusted for patient characteristics. Those hospitals with the lowest rate were set as the reference level
  3. Ungrouped acute peer group within public hospitals was removed from analysis due to small number of hospitals within this group
  4. aSignificant at 5 %; bsignificant at 1 %