Table 1.

Demographics, basic characteristics, and clinical findings of the patients.

Variables	Training set	Internal Validation set	External Validation set
Number of patients	582	155	258
Age(y)	67.4 ± 15.4	59.8 ± 19.2	66.4 ± 16.1
Gender	Male 49.5%	Male 53.2%	Male 58.1%
Height, cm	157.9 ± 9.2	162.1 ± 8.4	161.6 ± 8.4
Weight, kg	53.7 ± 35.6	65.9 ± 16.8	61.8 ± 13.3
BMI, kg/m2	23.3 ± 5.2	24.4 ± 1.5	23.6 ± 4.5
Mode EF %	61.1 ± 13.8	64.3 ± 7.1	61 ± 13.9
Mode EF < 50 (%)	12.8%	8.4%	19.3%
Patients with PE	582 (100%)	72 (46.5%)	163 (63.2)