Fig. 2From: Pulmonary artery catheter use in adult patients undergoing cardiac surgery: a retrospective, cohort studyPropensity score matching of the study population. a Following the selection of patients with a qualifying cardiac procedure, patients were divided into two cohorts based on use (or non-use) of a PAC. b A propensity score-based match was performed with the PAC and no-PAC populations to generate matched cohorts of 3442 patients for analysisBack to article page