Table 1.

Baseline characteristics of UKCTOCS participants used within this study

	Median (25th–75th centiles)
	Control		Ovarian cancer
			Overall		Type I		Type II
	n = 31		n = 49		n = 19		n = 30
Age (years) at randomisation	60.8 (58.4–65.8)		62.8 (58.7–67.3)		64.2 (58.9–69.9)		61.1 (58.7–65.5)
Years since last period at randomisation	12.6 (6.6–18.2)		11.4 (5.7–18.2)		15.2 (8.1–22.6)		10.7 (4.0–16.1)
Duration of HRT use in those who were on HRT at randomisation (yrs)	6.9 (5.8–11.7)		9.7 (4.8–13.0)		13.0 (10.7–13.9)		7.2 (3.3–11.6)
Duration of OCP use (yrs) in those who had used it	10 (3–12)		6 (3–8)		5 (3–8)		6 (4–8)
Miscarriages (pregnancies < 6mths)	0 (0–1)		0 (0–0)		0 (0–1)		0 (0–0)
No. of children (pregnancies > 6mths)	2 (0–2)		2 (2–2)		2 (1–2)		2 (2–3)
Height (cms)	162.6 (158.8–167.6)		162.6 (157.5–165.1)		162.6 (157.5–166.4)		162.6 (157.5–165.1)
Weight (kg)	65.3 (62.6–74.0)		69.9 (62.6–78.9)		71.2 (66.7–79.2)		65.9 (61.7–75.8)
	Number (%)
	No.	%	No.	%	No.	%	No.	%
Ethnicity:
White	30	96.8%	48	98.0%	18	94.7%	30	100.0%
Black	0	0.0%	0	0.0%	0	0.0%	0	0.0%
Asian	0	0.0%	0	0.0%	0	0.0%	0	0.0%
Other	1	3.2%	1	2.0%	1	5.3%	0	0.0%
Missing	0	0.0%	0	0.0%	0	0.0%	0	0.0%
Hysterectomy	1	3.2%	6	12.2%	2	10.5%	4	13.3%
Ever use of oral contraceptive pill	18	58.1%	21	42.9%	9	47.4%	12	40.0%
Use of HRT at recruitment	8	25.8%	9	18.4%	3	15.8%	6	20.0%
Personal history of cancera	0	0.0%	2	4.1%	1	5.3%	1	3.3%
Personal history of breast cancer	0	0.0%	1	2.0%	1	5.3%	0	0.0%
Maternal history of ovarian cancer	0	0.0%	1	2.0%	0	0.0%	1	3.3%
Maternal history of breast cancer	4	12.9%	4	8.2%	1	5.3%	3	10.0%

^aIncludes those with personal history of breast cancer.