Plasma fibroblast growth factor 23, parathyroid hormone, phosphorus, and risk of coronary heart disease.

BACKGROUND

Fibroblast growth factor 23 (FGF23), parathyroid hormone (PTH), and phosphorus all have been proposed as plasma biomarkers for the development of coronary heart disease (CHD) in individuals with normal renal function.

METHODS

In a nested case-control study of men in the Health Professionals Follow-up Study, free of diagnosed cardiovascular disease at blood draw, we prospectively examined associations between plasma FGF23, PTH, and phosphorus and risk of CHD. During 10 years of follow-up, 422 men developed nonfatal myocardial infarction or fatal CHD. Controls were selected in a 2:1 ratio and matched for age, date of blood collection, and smoking status.

RESULTS

Mean estimated glomerular filtration rate was 86 mL/min per 1.73 m(2) in cases and controls. At baseline, there were no statistically significant differences between cases and controls in plasma levels of FGF23, PTH, or phosphorus. After adjusting for matching factors, family history of myocardial infarction, body mass index, alcohol consumption, physical activity, history of diabetes mellitus and hypertension, ethnicity, region, plasma 25-hydroxyvitamin D, and other factors, the odds ratios for incident CHD for participants in the highest, compared with lowest, quartiles were 1.03 (95% CI 0.70-1.52, P for trend 0.84) for FGF23, 1.20 (95% CI 0.82-1.76, P trend 0.99) for PTH, and 0.72 (95% CI 0.51-1.02, P trend 0.13) for phosphorus.

CONCLUSIONS

Plasma FGF23, PTH, and phosphorus are not associated with the development of incident CHD in men without chronic kidney disease.