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[Hysterectomy in a Danish population. Weight-related factors, psychological factors and life style variables].

The aim was to assess risk factors for hysterectomy performed for benign conditions. In a prevalence study, 2301 Danish women were selected at random in 1982. Information about weight and slimming history, life-styles, psychological factors, gynaecological history, and social background were obtained. In an incidence study, the cohort was followed from 1982 to 1990 to assess the incidence of hysterectomy. In the prevalence study, weight cycling (recurrent weight loss and weight gain of more than 5 kg) was associated with hysterectomy for benign disease (adjusted odds ratio 1.77, 95% confidence interval 1.05-2.99) independently of overweight, smoking, oral contraceptives, psychological and social factors. In the incidence study, weight cycling was the only significant weight-related risk factor for hysterectomy performed for benign disease (adjusted relative risk 2.49, 95% confidence interval 1.10-5.60), explaining the relation between hysterectomy and psychological factors. Weight cycling might be an important risk factor for premenopausal hysterectomy performed for benign conditions.