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Table 1 PSI adjusted-incidence and variation across hospitals

From: Should policy-makers and managers trust PSI? An empirical validation study of five patient safety indicators in a national health service

  Mortality in Low-
mortality DRGs
Decubitus ulcer Catheter-related infection Postoperative PE or
DVT
Postoperative sepsis
Cases 683   18,738   5,375   9,727   10,602  
Patients at risk 1,255,647   2,190,633   2,954,018   1,949,434   612,590  
Adjusted-incidence * (range P5P95) 0.54 0 to 1.41 7.69 6.00 to 12.63 1.82 1.59 to 2.20 4.99 4.20 to 6.10 17.3 15.30 to 20.26
Statistics of variation           
RV 95-5 (CI95%) 12.88 9.36-14.98 2.03 1.79-2.32 1.37 1.31-1.44 1.39 1.33-1.58 1.31 1.24-1.35
RV 75-25 (CI95%) 7.06 4.77-7.88 1.40 1.33-1.44 1.15 1.11-1.17 1.15 1.13-1.18 1.12 1.10-1.14
EB (CI95%) 0.32 0.19-0.51 0.34 0.25-0.45 1.14. 0.85-1.51 0.19 0.12-0.28 0.30 0.19-0.45
  1. * Adjusted by: age, gender and Elixhauser's comorbidities except in PSI#2 where crude incidence is shown. Empirical Bayes statistic is a measure of systematic variation -variation beyond chance. A value different to 0 would represent systematic variation; as for its magnitude, the higher the value the more the systematic variation