CLOSER Discovery

The target sample was 1,788 women cohort members. Postal questionnaires were sent out at ages 47, 48, 49, 50, 51, 52, 53, and 54 years, and a total of 1,572 women gave information on at least one of these occasions. Non-responders to the postal questionnaire who were interviewed at the home visit in 1999 completed a short questionnaire about menopause and hysterectomy that matched questions asked on the postal questionnaires. A further follow-up study took place at 57 years (N=1,387). In all, 1735 women provided information on menopause and hysterectomy at one of these occasions. At 59 years those who had reported having a hysterectomy (N=374) were sent a questionnaire. In addition information was collected on confinements of women cohort members.

Study website: https://www.nshd.mrc.ac.uk/