Additional file 5: of Impact of bleeding complications on length of stay and critical care utilization in cardiac surgery patients in England

Figure S4. Standardized differences* before vs. after propensity score matching. *Each marker represents the standardized difference corresponding to a matching covariate used in the propensity score match. Black circles represent standardized differences before matching. Black triangles represent standardized differences after matching. Standardized differences with an absolute value < 0.10 are indicative of balance between matched groups. (DOCX 17 kb)