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Differences in urine creatinine and osmolality between black and white Americans after accounting for age, moisture intake, urine volume, and socioeconomic status

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  • Patrick B Wilson
  • Ian P Winter
  • Josie Burdin

Abstract

Urine osmolality is used throughout research to determine hydration levels. Prior studies have found black individuals to have elevated urine creatinine and osmolality, but it remains unclear which factors explain these findings. This cross-sectional, observational study sought to understand the relationship of self-reported race to urine creatinine and urine osmolality after accounting for age, socioeconomic status, and fluid intake. Data from 1,386 participants of the 2009–2012 National Health and Nutrition Examination Survey were utilized. Age, poverty-to-income ratio (PIR), urine flow rate (UFR), fluid intake, estimated lean body mass (LBM), urine creatinine, and urine osmolality were measured. In a sex-specific manner, black and white participants were matched on age, dietary moisture, UFR, and PIR. Urine creatinine was greater in black men (171 mg/dL) than white men (150 mg/dL) and greater in black women (147 mg/dL) than white women (108 mg/dL) (p

Suggested Citation

  • Patrick B Wilson & Ian P Winter & Josie Burdin, 2024. "Differences in urine creatinine and osmolality between black and white Americans after accounting for age, moisture intake, urine volume, and socioeconomic status," PLOS ONE, Public Library of Science, vol. 19(5), pages 1-11, May.
    • Handle: RePEc:plo:pone00:0304803
    DOI: 10.1371/journal.pone.0304803
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    References listed on IDEAS

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    1. Brooks, C.J. & Gortmaker, S.L. & Long, M.W. & Cradock, A.L. & Kenney, E.L., 2017. "Racial/ethnic & socioeconomic disparities in hydration status among US adults & the role of tap water & other beverage intake," American Journal of Public Health, American Public Health Association, vol. 107(9), pages 1387-1394.
    2. repec:aph:ajpbhl:10.2105/ajph.2017.303923_7 is not listed on IDEAS
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