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Table 1 Application of study inclusion criteria to identify eligible cardiac surgery patients

From: Impact of bleeding complications on length of stay and critical care utilization in cardiac surgery patients in England

Criterion Patients (N)
 1. Patients who underwent coronary artery bypass graft (CABG), valve repair/replacement, or an aortic operation in English hospitals between January 1, 2010, and Feb 29, 2016, as identified from the linked HES-APC and CPRD databases.† Restrict to the first cardiac surgery (index) observed for each patient during the study period. 17,339
 2. Age ≥ 18 years at index cardiac surgery. 17,142
 3. Registered with a general practitioner (GP) contributing data to the CPRD for at least one year prior to index. 7774
  1. HES-APC = Hospital Episode Statistics Admitted Patient Care (HES-APC) data warehouse. CPRD = Clinical Practice Research Datalink (CPRD)