Table 2. 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.
| Intakea | Urinary Excretionb | Ratio of Intake to Excretion | p-valuec | |
| Protein (g/day) | 85.0±12.0 | 87.9±3.6 | 1.03±0.25 | 0.486 |
| Sodium (g/day) | 3.03±0.44 | 3.18±0.83 | 0.95±0.19 | 0.919 |
| Potassium (g/day) | 2.93±0.43 | 2.83±0.43 | 1.04±0.32 | 0.553 |
Data are presented as means ± s.d.
a
Average daily intakes of protein, sodium, and potassium assessed by NDSR (Nutrition Diet System, St. Paul, MN).
b
Excretion measured from 4 weekly 24-hour urine collections. Protein = urinary nitrogen *7.72 (18), Potassium = urinary potassium *0.77 (19).
c
Comparison of ratios of intake to excretion; one sample t-test.