Table 1.

Characteristics and standard parameter for input training and validation by 3 specific groups.

Characteristic	Training group	External evaluation group	Internal evaluation group
	(n = 2000)	(n = 182)	(n = 33)
Male	88	81	18
Female	1912	101	15
Age	35.09 ± 11.56	22.01 ± 1.39	64.9 ± 13.9
BMI	24.86 ± 10.43	22.34 ± 12.8	N/A

Mean ± standard deviation. N/A: not available.