The fat mass and obesity-associated (FTO) gene variant rs9939609 predicts long-term incidence of cardiovascular disease and related death independent of the traditional risk factors

Abstract

Objective and methods The impact of the rs9939609 FTO variant on cardiovascular events was investigated in the 19-year follow-up of subjects recruited to the OPERA study.

Results A total of 212 cardiovascular disease (CVD) and 152 coronary heart disease (CHD) events or deaths occurred during follow-up. The logistic regression analysis revealed that among the AA genotype the incidence of CHD (OR 1.905; 95% CI 1.250–2.903, p = 0.001) and CVD (OR 1.849; 1.265–2.702, p = 0.003) events or death was significantly higher when adjusted for age, sex, and study group. After further adjustment with BMI, smoking status, systolic blood pressure, and low-density lipoprotein cholesterol, the higher incidence of CHD and CVD events or death among subjects with the AA genotype remained significant (OR 1.895; p = 0.002 and p = 0.004, respectively). In Cox regression analysis, the AA genotype displayed a higher rate of CVD and CHD death when the model was adjusted for sex, age, and study group (p = 0.006 and p = 0.046). FTO rs9939609 AA genotype improved the C-index of the final predictive model from 0.709 to 0.715. In reclassification analyses, the integrated discrimination index was significant 0.011 (p = 0.010).

Conclusion The AA genotype of FTO rs9939609 seems to be associated with a higher risk of CVD, and this phenomenon seems to be independent of the traditional risk factors for atherosclerosis.

Key messages

• The AA genotype of FTO rs9939609 seems to be associated with a higher risk of cardiovascular disease.

• This phenomenon seems to be independent of the traditional risk factors for atherosclerosis.

Keywords:

• Cardiovascular disease
• FTO
• mortality

Acknowledgements

We would like to thank Heidi Häikiö, Saija Kortetjärvi, Liisa Mannermaa, Leena Ukkola, and Kirsi Kvist-Mäkelä for expert technical assistance as well as Elina Malo, MSc, and Pauliina Pisto, MD, for help with the data. Funded by Finnish Foundation for Cardiovascular Research.

Declaration of interest

The authors report no conflicts of interest.