Fig. 1

Study flow diagram. A total of 172 patients were included in our analysis, which was split into a training set (n = 124, 70% of the sample) and a validation set (n = 48, 30% of the sample). ^†Others include 5 patients suspected of antiphospholipid antibody syndrome (n = 2) or thrombophilia (n = 3) at discharge. N, numbers of patients