Effects of Age, Sex, and Obesity on N-Terminal Pro B-Type Natriuretic Peptide Concentrations in the General Population.

BACKGROUND Data regarding complex relationships between age, sex, obesity and N-terminal pro B-type natriuretic peptide (NT-proBNP) remain scarce. Thus, we investigated sex-specific associations of obesity and NT-proBNP levels among adults in the general healthy population in Korea.Methods and Results:The associations of age, sex and obesity-associated parameters (waist circumference [WC], body mass index [BMI] and body weight) with NT-proBNP were analyzed in 39,937 healthy adult participants. Multivariable regression models adjusted for factors known to affect NT-proBNP were used to identify associations between NT-proBNP and obesity-related parameters. NT-proBNP levels were higher in females than males. Older age was also associated with higher NT-proBNP levels in the overall population (P<0.001). When accounting for age in multivariable linear regression models, there was a strong inverse association between WC, BMI, and NT-proBNP in females and a weaker inverse association in males, with a significant difference between the sexes (P interaction <0.001). After adjusting for the effects of WC and BMI on each other, abdominal obesity was associated with lower NT-proBNP levels in females but not males (P interaction <0.001). CONCLUSIONS In this large sample of young and healthy Asians, younger age, male sex, and increases in obesity-related parameters were related to lower levels of NT-proBNP. Further comprehensive studies are needed to understand the factors affecting NT-proBNP levels in different populations.

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