Abstract P085: Neighborhood Population Density is Associated With Lower Levels of Potassium Excretion in the Hispanic Community Health Study/Study of Latinos (HCHS/SOL)
Introduction: Sodium (Na) and potassium (K) intake are associated with cardiovascular disease risk. Whether neighborhood characteristics influence Na and K intake is not well-documented. We assessed the association of neighborhood socioeconomic status and population density with objectively measured 24-h urinary Na and K excretion levels as intake markers.
Methods: The SOL Nutrition & Physical Activity Assessment Study (SOLNAS) was an ancillary study of the HCHS/SOL, a population-based longitudinal study of Hispanics/Latinos in the Bronx, Chicago, Miami, and San Diego. 24-h urinary Na and K excretion levels were obtained from 485 participants. We used Census data to derive neighborhood characteristics for a subgroup of eligible participants based on residential census tract availability. Linear mixed models determined associations of neighborhood characteristics with Na and K excretion, and Na:K ratio.
Results: We analyzed 335 individuals from 3 sites. Mean 24-h excretion of Na and K, and Na:K ratio were 3593 mg (SD 1720), 2154 mg (SD 918) and 1.8 (SD 0.8). Neighborhood heterogeneity was observed for K excretion (intraclass correlation coefficient 0.09) but not Na excretion or Na:K ratio. In bivariate analyses, lower levels of K excretion were associated with lower neighborhood median household income (mean excretion for quartile 1 [Q1] 2049 mg, Q4 2410 mg, ptrend=0.04) and higher neighborhood population density (mean for Q1 2529 mg, Q4 1656 mg, ptrend<0.001). After adjusting for individual-level confounders, the association of K excretion with neighborhood income was no longer present (p=0.37), but the association with population density remained (p=0.04). Additional adjustment for other neighborhood factors attenuated the association with population density (p=0.07).
Conclusion: Higher neighborhood population density was associated with lower levels of 24-h K but not Na excretion. Future research should assess whether altering the food environment can improve K intake in densely populated neighborhoods.
Author Disclosures: D.B. Hanna: None. F. Gonzalez: None. K.N. Kershaw: None. A.G. Rundle: None. L. Van Horn: None. J. Wylie-Rosett: F. Ownership Interest; Modest; Merck. G. Consultant/Advisory Board; Modest; Alliance for Potato Research. R.C. Kaplan: None. Y. Mossavar-Rahmani: None. G.S. Lovasi: None.
- © 2015 by American Heart Association, Inc.