Table 1.

Clinicopathological characteristics of patients in the training and validation dataset

Characteristics	All (n = 145)	Training dataset (n = 100)	Validation dataset (n = 45)
Age (mean±SD), years	54.8±13.8	55.2±14.0	55.9±12.9
Sex
Female	73	51	22
Male	72	49	23
Histopathology
GIST	109	74	35
Leiomyoma	36	26	10
Tumor location	4
Esophagus	32	22	10
Stomach	105	72	33
Duodenum	8	6	2
Tumor size (median, range), cm
GIST	3.3 (1.4–16.0)	3.3 (1.4–16.0)	2.75 (1.5–14.0)
Leiomyoma	2.5 (1.0–10.0)	2.5 (1.-10.0)	2.9 (1.7–6.0)

GIST, gastrointestinal stromal tumor; SD, standard deviation.