Table 2.

Multivariate-adjusted differences in 24-h urinary oxalate excretion by age, BMI, weight, and history of diabetes

Difference in Urinary Oxalate (mg/d)95% CI
Age (per 5 yr increment)a−0.6−0.9 to −0.4
BMI (per kg/m2)b0.30.2 to 0.4
Weight (per 5-kg increment)c0.60.5 to 0.7
History of diabetesd2.00.7 to 3.3
  • a Adjusted for kidney stone history, cohort, history of diabetes (yes or no), weight (continuous), 24-h urinary excretion of creatinine, potassium, magnesium, and phosphorus (all in quartiles), dietary oxalate and calcium (quartiles), total intake of vitamin C (five categories), and supplemental calcium intake (four categories).

  • b Adjusted as above, except 24-h urinary creatinine and weight not in the model.

  • c Adjusted as above, except 24-h urinary creatinine and BMI not in the model.

  • d Participants without diabetes are the referent group. Adjusted for age, kidney stone history, cohort, weight (continuous), 24-h urinary excretion of creatinine, potassium, magnesium, and phosphorus (all in quartiles), dietary oxalate and calcium (quartiles), total intake of vitamin C (five categories), and supplemental calcium intake (four categories).