Table 3. Statistical analysis of clinical features in high- and low-risk groups.

Covariates	Type	Total, n (%)	Test, n (%)	Train, n (%)	P value
Age	≤65 years	274 (57.68)	134 (56.54)	140 (58.82)	0.68
	>65 years	199 (41.89)	102 (43.04)	97 (40.76)
	Unknown	2 (0.42)	1 (0.42)	1 (0.42)
Stage	Stage I	310 (65.26)	154 (64.98)	156 (65.55)	0.18
	Stage II	47 (9.89)	18 (7.59)	29 (12.18)
	Stage III	100 (21.05)	53 (22.36)	47 (19.75)
	Stage IV	18 (3.79)	12 (5.06)	6 (2.52)
Histology	Endometrioid	277 (58.32)	138 (58.23)	139 (58.4)	0.68
	Mixed	11 (2.32)	6 (2.53)	5 (2.10)
	Serous	46 (9.68)	26 (10.97)	20 (8.40)
	Unknown	141 (29.68)	67 (28.27)	74 (31.09)
Grade	Grade 1	87 (18.32)	39 (16.46)	48 (20.17)	0.32
	Grade 2	94 (19.79)	47 (19.83)	47 (19.75)
	Grade 3	153 (32.21)	84 (35.44)	69 (28.99)
	Unknown	141 (29.68)	67 (28.27)	74 (31.09)