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Population screening and referral for hypercholesterolemia
L Råstam1, R V Luepker, M B Mittelmark
1Department of Community Health Sciences, University of Lund in Malmoe, Sweden.
Insights
Cholesterol screening referral rates vary significantly based on the guidelines used. Different criteria for hypercholesterolemia can lead to a substantial patient load for healthcare systems.
Area of Science:
- Cardiovascular Health
- Public Health Screening
- Clinical Lipidology
Background:
- Hypercholesterolemia screening is a key public health strategy.
- Referral patterns are influenced by diagnostic criteria.
- The impact of screening on healthcare resources requires evaluation.
Purpose of the Study:
- To assess how different hypercholesterolemia screening criteria affect patient referral rates.
- To analyze the potential burden on healthcare systems due to cholesterol screening.
Main Methods:
- Systematic recruitment of an adult population sample (4,404 men, 5,164 women, aged 20-69).
- Screening for hypercholesterolemia using defined cutoff levels.
- Analysis of referral patterns based on Lipid Research Clinics, National Cholesterol Education Program (NCEP), and NIH Consensus Conference guidelines.
- Follow-up cholesterol determination for a subset of referred individuals.
Main Results:
- Referral rates varied widely: 7.3% (men) and 5.8% (women) using ≥265 mg/dL (Lipid Research Clinics), versus 49.2% (men) and 40.2% (women) using ≥200 mg/dL (NCEP).
- NIH Consensus Conference criteria resulted in 28.0% (men) and 21.8% (women) referrals.
- Of those initially screened with hypercholesterolemia (≥265 mg/dL), 36% had lower levels upon re-testing.
- High referral numbers are strongly dependent on chosen cutoff levels and population demographics.
Conclusions:
- Population-based cholesterol screening generates a large number of patients requiring follow-up.
- The choice of screening criteria significantly impacts referral volume and potential healthcare system load.
- Healthcare communities must be prepared for the resource demands associated with widespread cholesterol screening programs.
Abstract:
To determine the potential effect of screening on referral patterns, an adult population sample (4,404 men, 5,164 women, 20-69 years of age) was systematically recruited and screened for hypercholesterolemia and then analyzed by different cholesterol referral recommendations. Using levels suggested by the Lipid Research Clinics Coronary Primary Prevention Trial (greater than or equal to 265 mg/dL), 7.3% of men and 5.8% of women would be referred for follow-up. With the suggested recommendations of the National Cholesterol Education Program (NCEP), (greater than or equal to 200 mg/dL), 49.2% of men and 40.2% of women would be referred. The use of age-related definitions of the NIH Consensus Conference on Lipid Lowering results in 28.0% referrals in men and 21.8% in women. From this population, hypercholesterolemia subjects (greater than or equal to 265 mg/dL at screening; n = 624) were invited for a second cholesterol determination (58% returned), which found 36% below the 265 mg/dL level. Population screening for cholesterol is likely to produce large numbers of patients for follow-up, with the actual numbers strongly dependent on cutoff levels and age-sex distributions. Referral and follow-up of these patients may place a significant load on an unprepared health care community.