Re-assessing the contribution of serum total cholesterol, blood pressure and cigarette smoking to the aetiology of coronary heart disease: impact of regression dilution bias

Jonathan R Emberson, Peter H Whincup, Richard W Morris, Mary Walker

Research output: Contribution to journalArticle (Academic Journal)peer-review

106 Citations (Scopus)

Abstract

AIMS: To estimate the combined contribution of serum total cholesterol, blood pressure and cigarette smoking to coronary heart disease (CHD) risk after adjustment for regression dilution bias.

METHODS AND RESULTS: Six thousand, five hundred and thirteen middle-aged British men without CHD were followed for major CHD events over 10 years. The population attributable risk fraction (PARF) was predicted for a range of risk factor thresholds before and after adjustment for regression dilution of serum total cholesterol and blood pressure. Defining 'low-risk' individuals as being in the bottom tenth of the population distributions of serum total cholesterol (<5.2 mmol/l) and diastolic blood pressure (<70 mmHg) and a non-cigarette smoker, the PARF was 75%, increasing to 86% after adjustment for regression dilution. Regardless of the threshold criteria chosen, the PARF was substantially greater than 65% before adjustment for regression dilution and greater than 75% after adjustment. Exclusion of ex-smokers and passive smokers from the low-risk group increased estimates further. Adjustment for other coronary risk factors had little effect on the results.

CONCLUSIONS: At least 80% of major CHD events in middle-aged men can be attributed to the three strongest risk factors. Population-wide control of these factors is crucial for effective CHD prevention.

Original languageEnglish
Pages (from-to)1719-26
Number of pages8
JournalEuropean Heart Journal
Volume24
Issue number19
Publication statusPublished - Oct 2003

Keywords

  • Adult
  • Bias (Epidemiology)
  • Blood Pressure
  • Cholesterol
  • Cohort Studies
  • Coronary Disease
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Prospective Studies
  • Regression Analysis
  • Risk Factors
  • Smoking

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