Diabetes and cardiovascular events in women with polycystic ovary syndrome: a 20-year retrospective cohort study |
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| Authors: | Hamidreza Mani Miles J Levy Melanie J Davies Danielle H Morris Laura J Gray John Bankart Hannah Blackledge Kamlesh Khunti Trevor A Howlett |
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| Institution: | 1. Department of Cardiovascular Sciences, University of Leicester, Leicester Diabetes Centre, Leicester General Hospital, Leicester, UK;2. Department of Diabetes and Endocrinology, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK;3. Department of Health Sciences, University of Leicester, Leicester Diabetes Centre, Leicester General Hospital, Leicester, UK;4. Directorate of Public Health and Health Improvement, NHS Leicester City, Leicester City Council, Leicester, UK |
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| Abstract: | BackgroundPolycystic ovary syndrome (PCOS) is the most common endocrine problem in women of reproductive age with a reported prevalence of up to 15%. Women with PCOS are potentially at increased risk of cardiovascular (CV) diseases from well-established risk factors, including insulin resistance, obesity, and type 2 diabetes. However data showing excess CV events in this population are still lacking.MethodsWe investigated the incidence and prevalence of type 2 diabetes and cardiovascular events (myocardial infarction, angina, heart failure, stroke and CV death) in a retrospective cohort of women with PCOS (total follow-up >12 000 person-years) The cohort consisted of 2301 women attending a specialty clinic from 1988 to 2009 in Leicestershire, UK (mean age 29·6 years SD 9·1]).FindingsIncidence of type 2 diabetes, myocardial infarction, angina, heart failure, stroke, and CV death was respectively 3·6, 0·8, 1·0, 0·3, 0·0, and 0·4 per 1000 person-years. At the end of follow-up, prevalence of myocardial infarction in the age groups 45–54, 55–64, and older than 65 years were, respectively, 1·9%, 6·0%, and 27·3%, and of angina were 2·6%, 6·0%, and 27·3%. Age-group-specific odds ratios for prevalence of myocardial infarction and angina compared with the local female population (n=434 859) ranged between 2·6 (95% CI 1·0–6·3) and 12·9 (3·4–48·6) with the highest ratio being for myocardial infarction in the over-65 age group. Age, history of hypertension, and smoking had significant correlations with CV outcomes in women with PCOS (adjusted odds ratio 1·08 95% CI 1·03–1·12], p<0·01 vs 9·94 (3·77–26·19), p<0·01 vs 3·33 1·23–8·59], p<0·01).InterpretationWe have shown a high incidence and age-group-specific prevalence of type 2 diabetes, myocardial infarction, and angina in women with PCOS, with more than a quarter of those aged over 65 years having had a myocardial infarction or angina. These findings should be considered in treatment strategies, long-term planning, and CV risk reduction programmes for women with PCOS.FundingBritish Endocrine Society, National Institute for Health Research, and University of Leicester. |
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