Sex and ethnic differences associated with urinary sodium and potassium in African-American US white and Nigerian college students.
BP and urinary sodium and potassium were assessed in 183 African-American, 113 US white and 72 Nigerian college students. SBP was higher in African-American males compared with Nigerian and US white males (123.1, 117.6 and 115.7 mmHg, respectively, P < 0.05). There were no significant differences observed between African-American and white male students in overnight urinary excretion rates of sodium and potassium. In contrast, African-American females excreted more sodium (41.0 vs. 31.3 mEq per 8 hours, P < 0.01) and potassium (12.0 vs. 8.9 mEq per 8 hours, P < 0.05) compared with white females. Only among the white students was a significant sex difference observed in urinary electrolyte excretion rates, where males excreted at higher rates than females. Multiple regression models for the African-Americans revealed that potassium explained only 4% of the SBP variance. Among the US whites and Nigerians, sodium explained 4.9% and 6.8%, respectively, of the DBP variance.
Adams-Campbell
L L
LL
Howard University Cancer Centre, Division of Epidemiology and Cancer Control, Washington, DC 20060.
Nwankwo
M U
MU
Ukoli
F A
FA
Janney
C
C
D000293:Adolescent; D000328:Adult; D044383:Black People; D001794:Blood Pressure; D005260:Female; D006801:Humans; D006973:Hypertension / Q000209:etiology / Q000652:urine*; D008297:Male; D015999:Multivariate Analysis; D009549:Nigeria; D011188:Potassium / Q000652:urine*; D012727:Sex Characteristics; D012964:Sodium / Q000652:urine*; D013334:Students; D014481:United States; D014495:Universities; D044465:White People; D001741:Black or African American
D012964:Sodium; D011188:Potassium