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Cholesterol screening for women: who is "at-risk"?
Cheryl L Robbins1, Patricia M Dietz, Shanna Cox
1Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia 30341-3724, USA. ggf9@cdc.gov
Insights
Cardiovascular disease (CVD) risk definitions vary for women. Both the U.S. Preventive Services Task Force (USPSTF) and American Heart Association (AHA) identified high dyslipidemia prevalence, especially in older women.
Area of Science:
- Cardiovascular Health
- Public Health
- Epidemiology
Background:
- High cholesterol is a precursor to cardiovascular disease (CVD).
- Current guidelines recommend cholesterol screening for at-risk women.
- Varying definitions of CVD risk impact dyslipidemia prevalence estimates in women.
Purpose of the Study:
- To estimate the proportion of women without a prior dyslipidemia diagnosis who meet U.S. Preventive Services Task Force (USPSTF) and American Heart Association (AHA) cardiovascular disease (CVD) risk criteria.
- To report dyslipidemia prevalence stratified by age and CVD risk definition.
Main Methods:
- Utilized 2007-2008 National Health and Nutrition Examination Survey data (n=1,781).
- Analyzed a representative sample of the U.S. civilian, non-institutionalized population.
- Estimated proportions of women meeting USPSTF and AHA at-risk criteria and reported dyslipidemia prevalence by age.
Main Results:
- Over half of younger women (20-44 years) and 74.2% of older women (≥45 years) were USPSTF at-risk.
- Nearly all women (99.5% younger, 99.6% older) had at least one AHA risk factor.
- Dyslipidemia prevalence was 47.3% for USPSTF-at-risk younger women and 65.5% for USPSTF-at-risk older women; AHA-at-risk prevalence was 39.5% and 63.3%, respectively.
Conclusions:
- The AHA risk definition identified more women (45% more younger, 25% more older) than the USPSTF definition.
- Both definitions identified similar dyslipidemia prevalence estimates among women.
- High dyslipidemia prevalence in younger women warrants further research on early identification and treatment to reduce future CVD mortality.
Background:
High cholesterol often precedes cardiovascular disease (CVD) and guidelines recommend cholesterol screening among at-risk women. Definitions of CVD risk vary and prevalence of dyslipidemia (abnormal total cholesterol, high-density lipoprotein (HDL-C), or non-HDL-C) among at-risk women may vary by age and definition of CVD risk.
Methods:
This study used 2007-2008 National Health and Nutrition Examination Survey data (n=1,781), a representative sample of the U.S. civilian, non-institutionalized population, to estimate the proportion of women without previous dyslipidemia diagnosis who are U.S. Preventive Services Task Force (USPSTF) at-risk and American Heart Association (AHA) at-risk. We also report dyslipidemia prevalence stratified by age.
Results:
Over half (55.0%) of younger women (20-44 years) and 74.2% of older women (≥45 years) were USPSTF at-risk, while nearly all younger and older women had at least one AHA risk factor (99.5% and 99.6%, respectively). Dyslipidemia prevalence among younger women was 47.3% (95% confidence interval [CI]: 42.2-52.5) for USPSTF-at-risk and 39.5% (95% CI: 35.7-43.4) for AHA at-risk. Among older women, it was 65.5% (95% CI: 60.8-69.9) for USPSTF at-risk and 63.3% (95% CI: 59.0-67.4) for AHA at-risk.
Conclusions:
The AHA risk definition identified 45% more young women and 25% more older women than the USPSTF risk definition; however, both definitions of at-risk identified similar prevalence estimates of dyslipidemia among women. Given a high prevalence of dyslipidemia among younger women, future research is needed to assess whether identification and treatment of young women with dyslipidemia will decrease CVD mortality among them later in life.
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