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Table 5 Spearman’s correlations between the adjusted 30-day mortality measures W30D, S30D and IH30D and mean length of stay (LOS)

From: Comparing hospital mortality – how to count does matter for patients hospitalized for acute myocardial infarction (AMI), stroke and hip fracture

   Rank W30D Rank S30D Rank IH30D§
AMI (N=55) Rank W30D 1.00 0.94 0.90
  Rank S30D   1.00 0.82
  Rank IH30D    1.00
  Mean LOS 0.05 −0.11 0.15
Stroke (N=59) Rank W30D 1.00 0.87 0.91
  Rank S30D   1.00 0.78
  Rank IH30D    1.00
  Mean LOS −0.22 −0.22 0.05
Hip fracture (N=58) Rank W30D 1.00 0.81 0.66
  Rank S30D   1.00 0.49
  Rank IH30D    1.00
  Mean LOS −0.54 −0.35 −0.02
  1. AMI: Acute myocardial infarction.
  2. W30D: In-and-out-of-hospital mortality within 30 days, attributing the outcome to all hospitals by fraction of time spent in each hospital for transferred patients.
  3. S30D: In-and-out-of-hospital mortality within 30 days, patients treated at one hospital only.
  4. §IH30D: In-hospital mortality within 30 days, for each hospital admission.