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• W4387062971 abstract "PURPOSE: To evaluate potential differences in urine specific gravity (USG) levels among racial/ethnic groups in the United States population. METHODS: A total of 2,329 men and 2,301 non-pregnant women (aged 20 yr and older) free of self-reported kidney disease from the 2007-2008 National Health and Nutrition Examination Survey were included in this analysis. Variables assessed included USG, demographics (including race/ethnicity), dietary moisture and protein intakes, urinary creatinine, and arm circumference (a marker of appendicular lean mass). Linear regression was used to estimate USG levels among different racial/ethnic groups (unadjusted) as well as after adjusting for several variables. Data are reported as mean ± SE. RESULTS: Among men, blacks had the highest USG level (1.0197 ± 0.0004), which was significantly different (p < .05) from whites (1.0177 ± 0.0003) and other/multiracial men (1.0173 ± 0.0007) but not Mexican Americans (1.0189 ± 0.0005) or other Hispanics (1.0189 ± 0.0009). In women, blacks also had the highest USG (1.0186 ± 0.0003), and this was significantly greater (p < .05) than Mexican Americans (1.0169 ± 0.0005), other Hispanics (1.0170 ± 0.0005), whites (1.0142 ± 0.0004), and other/multiracial women (1.0145 ± 0.0009). Using a USG threshold of >1.020, the supposed prevalence of hypohydration was as high as 54.7% in black men and as low as 22.3% in other/multiracial women. Adjustment for urinary creatinine had a large impact on the estimated USG for black men and women, leading to lower estimated USG levels (p < .01) than compared to all other racial/ethnic groups among men, and lower USG levels than Mexican Americans and Other Hispanics in women. Further adjustment for dietary moisture, dietary protein, and arm circumference did not materially change estimated USG values. The results were similar when the analyses were restricted to adults aged 20-40. CONCLUSIONS: Black men and women in the United States have elevated USG levels, which are largely explained by a greater concentration of urinary creatinine. Depending on the racial/ethnic group examined, using set USG cutpoints (e.g. >1.020) may lead to over- or -under-estimating the prevalence of hypohydration." @default.
• W4387062971 created "2023-09-27" @default.
• W4387062971 creator A5062254336 @default.
• W4387062971 date "2023-09-01" @default.
• W4387062971 modified "2023-09-27" @default.
• W4387062971 title "Urine Specific Gravity Differs By Race/ethnicity: A Case For Not Defining Hypohydration With Universal Cutpoints" @default.
• W4387062971 doi "https://doi.org/10.1249/01.mss.0000982408.01207.90" @default.
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