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Table 2 Hospital level mortality of non-elderly patients discharged with a principal diagnosis of pneumonia overall and by hospital case volume level, Japanese DPC database, 2010

From: Association between hospital case volume and mortality in non-elderly pneumonia patients stratified by severity: a retrospective cohort study

  Total Very low (≤7) Low (8–11) Medium (12–17) High (≥18)
Number of patients 8293 1771 2020 2146 2356
Number of hospitals 896 429 218 150 99
% of hospitals with zero mortality 75 86 72 65 53
% range of mortality rates 0-100 0-100 0-27 0-23 0-16