Comparison of reported average (28 days) intake of protein, sodium, and potassium with the corresponding biological markers in urine in the caloric restriction (CR) diet group.

Data are presented as means ± s.d.aAverage daily intakes of protein, sodium, and potassium assessed by NDSR (Nutrition Diet System, St. Paul, MN).bExcretion measured from 4 weekly 24-hour urine collections. Protein = urinary nitrogen *7.72 (18), Potassium = urinary potassium *0.77 (19).cComparison of ratios of intake to excretion; one sample t-test.