Table 1.

Clinicopathologic characteristics of the patients in AMC and SNUBH datasets.

	AMC			SNUBH
	Training set (n = 157)	Validation set (n = 40)	Test set (n = 100)	Test set (n = 228)
Age (median and range)	50 (28–80)	49 (30–68)	47 (34–75)	52 (25–87)
Sex
Female	157 (100%)	40 (100%)	100 (100%)	228 (100%)
Metastatic carcinoma
Present, size > 2 mm	68 (43.3%)	14 (35%)	40 (40%)	84 (36.8%)
Present, size ≤ 2 mm	35 (22.3%)	5 (12.5%)	15 (15%)	44 (19.2%)
Absent	54 (34.4%)	21 (52.5%)	45 (45%)	100 (44%)

AMC, Asan Medical Center; SNUBH, Seoul National University Bundang Hospital.