Skip to main content


Table 1 Results of matching of cases to control patients using four major criteria

From: Thrombocytopenia in critically ill surgical patients: a case-control study evaluating attributable mortality and transfusion requirements

  Proportion of cases matched to control patients
Criterion n/n %
Same primary diagnosis 35/36 97
Same duration of stay in ICU (± 5 days) 31/36 86
Same APACHE II score (± 5) 29/36 81
Same age (± 5 years) 27/36 75
  1. APACHE, Acute Physiology and Chronic Health Evaluation; ICA,intensive care unit.