Table 4.

Twenty-four-hour urine composition by DASH score in younger women (NHS II)

ComponentQuintile 1Quintile 2Quintile 3Quintile 4Quintile 5P for Trend
Calcium (mg)1962072122002190.05
Oxalate (mg)27262828280.03
Citrate (mg)6657287807647720.002
Uric acid (mg)5035045065225180.09
Sodium (mEq)1521481551521500.97
Sulfate (mmol)16171717180.01
Potassium (mEq)4852565964<0.001
Magnesium (mg)9096100105105<0.001
Phosphate (mg)8328348358538570.15
pH (units)5.96.06.16.16.1<0.001
Volume (L)1.491.651.681.841.96<0.001
RSS
    calcium oxalate1.931.641.711.481.49<0.001
    brushite1.661.571.711.471.560.32
    uric acid2.231.861.701.511.39<0.001
  • Means adjusted for age, kidney stone history (yes or no), BMI, hypertension, diabetes, thiazide use, and 24-hour urinary creatinine.