INCIDENCE, CAUSES AND SURGICAL METHODS FOR HYSTERECTOMY IN FINLAND, 1987-1989

Background. The objective of our study was to investigate the incidence of hysterectomy by age, indication and surgical method employed during 1987-1989 in Finland, corrected by 'uteri or cervix at risk' population. Methods. Three years (1987-1989) of patient discharges from the Finnish Hospital Discharge Register, which covers all Finnish hospitals including the few private ones, was used. Patients represented all Finnish adult women (approximately 2000000). Results. Approximately 9000 hysterectomies are performed annually in Finland. The annual incidence of hysterectomy was 348/100000 women (most among women aged 45-49), and after correction for 'uteri or cervix at risk' this rose by 11% to 390/100000. The most frequent indications were leiomyoma (50%) and endometriosis (11%). Prolapse, menstrual disorders and cancer each accounted for 7-8% of all hysterectomies. The most common surgical approach was total abdominal hysterectomy (36%), while hysterectomy with bilateral oophorectomy and partial hysterectomy each accounted for 20% of operations. Differences in the rates by indication or surgical approach between 'uteri or cervix at risk' corrected and uncorrected estimates varied between 0% and 22%. Conclusions. The incidence of, and indications for hysterectomy in Finland are approximately the same as in other European countries, but partial hysterectomy is more common in Finland. Because the correction for the 'uteri or cervix at risk' population produced changes in the rates of hysterectomy, correction should be considered when calculating hysterectomy rates or incidences of cervical or endometrial cancer.