Human Epididymis Protein 4 (HE4) Reference Limits in Polish Population of Healthy Women, Pregnant Women, and Women with Benign Ovarian Tumors

Table 1

Study group characteristics.

Group	All		Premenopausal		Postmenopausal
	Total of patients ()	Median age (range) (years)		Median age (range) (years)		Median age (range) (years)
Healthy women	265	48 (17-78)	157	38 (17-54)	108	59 (45-78)
Women with a benign tumor	195	43 (16-83)	139	37 (16-53)	56	60 (49-83)
Pregnant women	157	30 (18-46)	—