Separate and combined associations of obesity and metabolic health with coronary heart disease: a pan-European case-cohort analysis
- PMID: 29020414
- PMCID: PMC6198928
- DOI: 10.1093/eurheartj/ehx448
Separate and combined associations of obesity and metabolic health with coronary heart disease: a pan-European case-cohort analysis
Abstract
Aims: The hypothesis of 'metabolically healthy obesity' implies that, in the absence of metabolic dysfunction, individuals with excess adiposity are not at greater cardiovascular risk. We tested this hypothesis in a large pan-European prospective study.
Methods and results: We conducted a case-cohort analysis in the 520 000-person European Prospective Investigation into Cancer and Nutrition study ('EPIC-CVD'). During a median follow-up of 12.2 years, we recorded 7637 incident coronary heart disease (CHD) cases. Using cut-offs recommended by guidelines, we defined obesity and overweight using body mass index (BMI), and metabolic dysfunction ('unhealthy') as ≥ 3 of elevated blood pressure, hypertriglyceridaemia, low HDL-cholesterol, hyperglycaemia, and elevated waist circumference. We calculated hazard ratios (HRs) and 95% confidence intervals (95% CI) within each country using Prentice-weighted Cox proportional hazard regressions, accounting for age, sex, centre, education, smoking, diet, and physical activity. Compared with metabolically healthy normal weight people (reference), HRs were 2.15 (95% CI: 1.79; 2.57) for unhealthy normal weight, 2.33 (1.97; 2.76) for unhealthy overweight, and 2.54 (2.21; 2.92) for unhealthy obese people. Compared with the reference group, HRs were 1.26 (1.14; 1.40) and 1.28 (1.03; 1.58) for metabolically healthy overweight and obese people, respectively. These results were robust to various sensitivity analyses.
Conclusion: Irrespective of BMI, metabolically unhealthy individuals had higher CHD risk than their healthy counterparts. Conversely, irrespective of metabolic health, overweight and obese people had higher CHD risk than lean people. These findings challenge the concept of 'metabolically healthy obesity', encouraging population-wide strategies to tackle obesity.
Keywords: Adiposity; Coronary heart disease; Epidemiology; Metabolic syndrome; Obesity.
Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2017. For permissions, please email: journals.permissions@oup.com.
Conflict of interest statement
Comment in
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Obesity and prognosis: Time to forget about metabolically healthy obesity.Eur Heart J. 2018 Feb 1;39(5):407-409. doi: 10.1093/eurheartj/ehx535. Eur Heart J. 2018. PMID: 29029011 No abstract available.
References
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- Alberti KG, Eckel RH, Grundy SM, et al. Harmonizing the metabolic syndrome: a joint interim statement of the International Diabetes Federation Task Force on Epidemiology and Prevention; National Heart, Lung, and Blood Institute; American Heart Association; World Heart Federation; International Atherosclerosis Society; and International Association for the Study of Obesity. Circulation. 2009;120:1640–5. - PubMed
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- MR/M012190/1/MRC_/Medical Research Council/United Kingdom
- RG/13/13/30194/BHF_/British Heart Foundation/United Kingdom
- FS/18/5/33319/BHF_/British Heart Foundation/United Kingdom
- RG/08/014/24067/BHF_/British Heart Foundation/United Kingdom
- MR/L003120/1/MRC_/Medical Research Council/United Kingdom
- MC_UU_12015/1/MRC_/Medical Research Council/United Kingdom
- 268834/ERC_/European Research Council/International
- A16491/CRUK_/Cancer Research UK/United Kingdom
- 001/WHO_/World Health Organization/International
- G0800270/MRC_/Medical Research Council/United Kingdom
- 16491/CRUK_/Cancer Research UK/United Kingdom
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