TY - JOUR
T1 - Total body potassium differs by sex and race across the adult age span
AU - He, Qing
AU - Heo, Moonseong
AU - Heshka, Stanley
AU - Wang, Jack
AU - Pierson, Richard N.
AU - Albu, Jeanine
AU - Wang, Zimian
AU - Heymsfield, Steven B.
AU - Gallagher, Dympna
PY - 2003/7
Y1 - 2003/7
N2 - Background: Total body potassium (TBK) is an index of fat-free mass. Data describing changes in TBK in African American, Asian, or Hispanic populations have not been reported. Objective: The aim was to investigate possible sex and racial differences in TBK in adults over an age range of 70 y. Design: The study used longitudinal and cross-sectional data collected in a body-composition unit from 973 men and 1368 women of African American, Asian, white, and Hispanic race-ethnicity. Random coefficient models in which baseline weight and height were taken into account were applied to estimate sex-specific changes in TBK among the 4 racial-ethnic groups. Results: The ages of 30 and 31 y were identified for women and men, respectively, as the cutoffs after which TBK began to decline. Both sexes had similar racial-ethnic patterns for expected mean TBK at the age cutoffs: African Americans had the highest value, followed by whites, Hispanics, and Asians. After the age cutoffs, the decline in TBK differed by race and sex. In women, African Americans showed the most rapid decline, whereas Asians had the lowest. In men, Hispanics had the most rapid decline in TBK, followed by African Americans, whites, and Asians. Conclusion: Significant sex and racial differences exist in the rate of change in TBK with age. Further studies are needed to explore the associations of declining TBK with health risks.
AB - Background: Total body potassium (TBK) is an index of fat-free mass. Data describing changes in TBK in African American, Asian, or Hispanic populations have not been reported. Objective: The aim was to investigate possible sex and racial differences in TBK in adults over an age range of 70 y. Design: The study used longitudinal and cross-sectional data collected in a body-composition unit from 973 men and 1368 women of African American, Asian, white, and Hispanic race-ethnicity. Random coefficient models in which baseline weight and height were taken into account were applied to estimate sex-specific changes in TBK among the 4 racial-ethnic groups. Results: The ages of 30 and 31 y were identified for women and men, respectively, as the cutoffs after which TBK began to decline. Both sexes had similar racial-ethnic patterns for expected mean TBK at the age cutoffs: African Americans had the highest value, followed by whites, Hispanics, and Asians. After the age cutoffs, the decline in TBK differed by race and sex. In women, African Americans showed the most rapid decline, whereas Asians had the lowest. In men, Hispanics had the most rapid decline in TBK, followed by African Americans, whites, and Asians. Conclusion: Significant sex and racial differences exist in the rate of change in TBK with age. Further studies are needed to explore the associations of declining TBK with health risks.
KW - African Americans
KW - Age
KW - Asians
KW - Hispanics
KW - Race
KW - Sex
KW - Skeletal muscle mass
KW - Total body potassium
KW - Whites
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U2 - 10.1093/ajcn/78.1.72
DO - 10.1093/ajcn/78.1.72
M3 - Article
C2 - 12816773
AN - SCOPUS:0037493494
SN - 0002-9165
VL - 78
SP - 72
EP - 77
JO - American Journal of Clinical Nutrition
JF - American Journal of Clinical Nutrition
IS - 1
ER -