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Persistent high rates of hysterectomy in Western Australia: a population-based study of 83 000 procedures over 23
K Spilsbury1, J B Semmens, I Hammond
1Centre for Health Services Research, School of Population Health, University of Western Australia, Crawley, Western Australia, Australia.
Objective:
To investigate incidence trends and demographic, social and health factors associated with the rate of hysterectomy and morbidity outcomes in Western Australia and compare these with international studies.
Design:
Population-based retrospective cohort study.
Setting:
All hospitals in Western Australia where hysterectomies were performed from 1981 to 2003.
Population:
All women aged 20 years or older who underwent a hysterectomy.
Methods:
Statistical analysis of record-linked administrative health data.
Main Outcome Measures:
Rates, rate ratios and odds ratios for incidence measures and length of stay in hospital and odds ratios for morbidity measures.
Results:
The age-standardised rate of hysterectomy adjusted for the underlying prevalence of hysterectomy decreased 23% from 6.6 per 1000 woman-years (95% CI 6.4-6.9) in 1981 to 4.8 per 1000 woman-years (95% CI 4.6-4.9) in 2003. Lifetime risk of hysterectomy was estimated as 35%. In 2003, 40% of hysterectomies were abdominal. The rate of hysterectomy to treat menstrual disorders fell from 4 per 1000 woman-years in 1981 to 1 per 1000 woman-years in 1993 and has since stabilised. Low socio-economic status, having only public health insurance, nonindigenous status and living in rural or remote areas were associated with increased risk of having a hysterectomy for menstrual disorders. Indigenous women had higher rates of hysterectomy to treat gynaecological cancers compared with nonindigenous women, particularly in rural areas. The odds of a serious complication were 20% lower for vaginal hysterectomies compared with abdominal procedures.
Conclusion:
Western Australia has one of the highest hysterectomy rates in the world, although proportionally, significantly fewer abdominal hysterectomies are performed than in most countries.
