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London, UK – 31 Aug 2015: Women aged 45 years and under with diabetes have a six-fold risk of heart attack, according to research presented at ESC Congress today.1 The study in more than 7 000 women also found that young women who had a heart attack (myocardial infarction, MI) were more likely to be smokers than older women with MI.
EMBARGO : 31 August 2015 at 13:00 BST
“Cardiovascular diseases (CVDs) affect mainly the elderly, but for many years an increase in incidence has been observed in young people as well, regardless of gender,” said Professor Hanna Szwed, last author and head of the 2nd Department of Coronary Artery Disease, Institute of Cardiology in Warsaw, Poland. “The World Health Organization estimates that CVDs cause more than 52% of all deaths in women and the number continues to rise. Up to 1% of all heart attacks are in young women.”
This study in 7 386 women assessed the effect of risk factors on MI incidence in young women and assessed differences related to age. The epidemiological profile of 1 941 young women (aged ≤45 years) with MI was retrospectively compared with two control groups: 4 275 women aged 63-64 years with MI and 1 170 healthy women (no MI history) aged ≤45 years.
The study used data from three national registries. Data on women with MI came from the Polish Registry of Acute Coronary Syndromes (PL-ACS).2 Information on healthy women was from the Multicentre Study of State National Population Health (WOBASZ)3 and National Survey of Risk Factors for Cardiovascular Diseases (NATPOL).4
The average age among young MI patients in the study was 42 years (range 21-45 years). Multivariate analysis showed that four out of five classic risk factors were independent predictors of MI in young women. The strongest was diabetes which increased MI risk by six-fold. Arterial hypertension increased risk by four times while hypercholesterolemia tripled risk and current smoking increased risk by 1.6 times. There was no statistical significance for obesity expressed by body mass index (BMI).5
Professor Szwed said: “The lack of a correlation with obesity could be because of the overwhelming influence of diabetes in this population. We also found that the risk of MI in young women increased with the number of coexisting factors (Figure 1).”
The researchers found that young healthy women had an average of 1.1 risk factors, while young MI patients had 1.7 and older women with MI had 2.0. Compared to young healthy women, young women with MI more often had arterial hypertension, hypercholesterolemia and diabetes and were current or past smokers (Figure 2).6
In the population of older women with MI, the prevalence of nearly all individual risk factors was even greater than in young women with MI.7 Smoking was the only risk factor with a greater prevalence in the younger group (48.7% vs.22.2% p<0.0001 forcurrentsmoking, and 65.5% vs.45.1% p<0.0001 for pastsmoking) (Figure 2). “We found that therisk factor profile in young women with MI was similar to the older population apart from the greater occurrence of tobacco smoking in young women,” said Professor Szwed.“This finding correlates with other research which shows that smoking is a growing problem in young women.This is clearly an area where prevention efforts are needed.” Interestingly, youngwomenwith MI were morelikely thanolder women to have none of the above-mentionedrisk factors(16.5%vs.8.2% p <0.0001).The most frequent risk factor inthis subgroupof patients(bothfor youngerand older women)wasa familyhistoryof coronary artery disease,with a higher rate in younger compared to older women (11.9%vs5.5% p=0.0035).
Professor Szwed concluded: “At present there are not enough global scientific reports focused on the problem of coronary heart disease in young populations, particularly in women. More research is needed into this growing problem to deepen our knowledge, improve prevention efforts and reduce mortality.”
Figure 1: Relationship between average number of risk factors and rate of heart attacks in young women according to age
Figure 2: Prevalence of risk factors by age and history of myocardial infarction
NATPOL/WOBASZ: healthy women aged <45 years; PL-ACS: women with history of MI
1The abstract ‘The cardiovascular disease risk factor profile in a young woman (under the age of 45) with acute coronary syndrome (ACS)’ will be presented:• By Professor Szwed during the press conference ‘Life Threatening Scenarios’ on Monday 31 August at 13 :00• By Dr Maciej Beckowski (first author) during Poster session 6 : Coronary artery disease and comorbidities VII on Tuesday 1 September at 8:30 in the Poster Area2The Polish Registry of Acute Coronary Syndromes (PL-ACS) counts 585 474 patients as of today. It includes data collected since 2004 concerning acute myocardial infarction, starting with risk factors and finishing with prognosis and mortality.3The Multicentre Study of State National Population Health (WOBASZ) was set up to implement the World Health Organization (WHO) Assembly resolution of 2000 on measures to reduce morbidity, disability and premature death due to chronic non-communicable diseases.4The National Survey of Risk Factors for Cardiovascular Diseases (NATPOL) was designed to assess the scale of the prevalence of hypertension and other major risk factors for cardiovascular disease, including lipid disorders and diabetes, in society.5Results with odds ratio (OR) and confidence interval (CI): Diabetes increased MI risk by six-fold (OR=6.657, 95%CI=3.478-12.741). Arterial hypertension increased risk by four times (OR=4.298, 95%CI=3.429-5.387) while hypercholesterolemia tripled risk (OR=3.346, 95%CI=2.605-4.299) and current smoking increased risk by 1.6 times (OR=1.631, 95%CI=1.340-1.987). There was no statistical significance for obesity expressed by body mass index (BMI) (OR=0.996, 95%CI=0.975-1.017).6Prevalence of risk factors in young women with MI compared to young women with no history of MI: arterial hypertension (48.8% vs. 16.7% p <0.0001), current smoking (48.7% vs. 40.0% p <0.0001), past smoking (65,5% vs. 42,7% p <0.0001 - value only for NATPOL population), hypercholesterolemia (36.1% vs. 12.5% p <0.0001), obesity (22.3% vs. 15.3% p <0.0001), diabetes mellitus (10.6% vs. 1.4% p <0.0001).7Prevalence of risk factors in the population of older women with MI: arterial hypertension 78.1%, hypercholesterolemia 44.3%, diabetes mellitus 29.9% and obesity 28.1%.
SOURCES OF FUNDING: This study received no specific funding.
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About the European Society of CardiologyThe European Society of Cardiology (ESC) represents more than 90 000 cardiology professionals across Europe and worldwide. Its mission is to reduce the burden of cardiovascular disease in Europe. About ESC Congress 2015ESC Congress is the world’s largest and most influential cardiovascular event contributing to global awareness of the latest clinical trials and breakthrough discoveries. ESC Congress 2015 takes place 29 August to 2 September at ExCel London in London, UK. Access the scientific programme. More information is available from the ESC Press Office at email@example.com.To access all the scientific resources from the sessions during the congress, visit ESC Congress 365. This press release accompanies both a presentation and an ESC press conference at the ESC Congress 2015. Edited by the ESC from material supplied by the investigators themselves, this press release does not necessarily reflect the opinion of the European Society of Cardiology. The content of the press release has been approved by the presenter.
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