The Women's Health in the Lund Area (WHILA) study—An overview

The Women's Health in the Lund Area (WHILA) study invited all women (n = 10,766) living in the Lund area of Southern Sweden by 1995, who were born between 1935 and 1945. The health screening program included a postal validated questionnaire concerning medical history, drug treatment, family history of diabetes and hypertension, menopausal status, smoking and alcohol habits, education, household, and working status, physical activity, quality of life as well as subjective physical and mental symptoms.The screening consisted of a routine physical examination with standardized blood pressure measurements, bone densitometry and an extended laboratory examination. A link with the mammography registry was established. Based on menopausal status, the population was divided in three subgroups; premenopausal (PM), postmenopausal with hormone replacement therapy (PMT), and postmenopausal without hormone replacement therapy (PM0). Menopause was defined as a bleed-free interval of at least 12 months.Of 10,766 women, 6917 (64.2%) had complete data sets. A number of observational analyses were carried out based on the screening data at baseline, to be followed by long-term follow-up analyses based on national register linkages that are currently being started.