Fig. 2From: Correlation of the severity of anemia in patients undergoing total joint arthroplasty with preoperative deep vein thrombosis: a retrospective cohort studyDistribution characteristics of covariates in TJA patients before and after PSM in the anemia and non-anemia groups. CHD coronary heart disease; COPD chronic obstructive pulmonary disease; PSM propensity score matching; P < 0.05 was considered statistically significantBack to article page