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Table 4 Results of subgroup analyses

From: Procedure-based severity index for inpatients: development and validation using administrative database

 

n

Mortality rate

c-statistic

95 % CI

Admission-precipitating diagnosis

  Acute myocardial infarction

10 176

8.6 %

0.821

0.806 – 0.836

  Congestive heart failure

56 927

9.8 %

0.709

0.702 – 0.716

  Acute cerebrovascular disease

90 071

8.6 %

0.801

0.796 – 0.807

  Gastrointestinal hemorrhage

34 429

4.7 %

0.791

0.780 – 0.801

  Pneumonia

68 386

11.0 %

0.733

0.727 – 0.739

  Septicemia

9342

22.4 %

0.699

0.686 – 0.711

Admission by ambulance

  No

166 979

6.5 %

0.769

0.764 – 0.773

  Yes

102 327

14.3 %

0.744

0.740 – 0.748

Referral from another institution

  No

161 494

9.9 %

0.769

0.766 – 0.773

  Yes

107 808

8.8 %

0.762

0.757 – 0.767

Hospital type

  Non-academic

225 479

9.6 %

0.767

0.764 – 0.770

  Academic

34 162

8.3 %

0.759

0.749 – 0.769

  1. CI – confidence interval