Table 1.

Analysis of patients in the training and validation cohorts

Characteristics	Training Cohort	Validation Cohort	P
No. of patients	116	76	-
Age, mean±SD	56.92±10.62	57.26±11.41	0.160
Gender, n (%)
Male	64 (55)	39 (51)	0.600
Female	52 (45)	37 (49)	0.600
Adenocarcinoma
group, n (%)
IAC group	80 (69)	53 (70)	0.910
non-IAC group	36 (31)	23 (30)	0.201

Abbreviations: IAC, invasive adenocarcinoma; SD, standard deviation.