Table 3.

Prescription of medications that affect urinary stone recurrence during the first yr after incident stone diagnosis, among patients who completed at least one 24-h urine test, by geographic region

Geographic RegionThiazide PrescriptionsAlkali PrescriptionsAllopurinol Prescriptionsa
24-h Urine Calcium >200 mg/d (n=5292)24-h Urine Citrate ≤400 mg/d (n=5433)24-h Urine Uric Acid >800 mg/d (n=601)
Participants Receiving Medication during First Year after Diagnosis (N, %)Difference from Baseline in Proportion of Participants Receiving Medication (%)Participants Receiving Medication during First Year after Diagnosis (N, %)Difference from Baseline in Proportion of Participants Receiving Medication (%)Participants Receiving Medication during First Year after Diagnosis (N, %)Difference from Baseline in Proportion of Participants Receiving Medication (%)
Midwest424 (30%)15559 (37%)2997 (11%)6
Northeast149 (25%)7252 (35%)2726 (6%)4b
Southeast353 (27%)10545 (36%)2678 (8%)4
West536 (27%)11643 (39%)3279 (8%)3
  • All P values for changes in prescriptions were significant at <0.001 except where marked. All P values for differences in changes in prescriptions between regions were significant at <0.001.

  • a Excluding patients with gout.

  • b P value 0.009.