Table 4.

Patient characteristics in different studies.

	Prevalence (%)	Mean age	Premenopausal (%)	Parity (more than 3) (%)	OCP (%)	Smoking history (%)	Family history of cancer (%)
Kuwaita	12.2	48	61	50.2	44	7.7	20
Lebanon26	9.3	52	48				10
Turkey29	10.6	44	70		35
Singapore23	11	53
Korea27	16	45
Japan24		56
Mayo Clinic34		59.7
Bauer et al.16		50		64.6
Dent et al.28		50
Phipps et al.37				57	55		28
Kwan et al.36				34	72	49	20

^aCurrent study.