Table 2.
Prescription of medications that affect urinary stone recurrence during the first year after incident stone diagnosis
| Medication | Without 24-h Urine Test (N=113,186; 87%) | With 24-h Urine Test (N=17,303; 13%) | Percentage Difference in Proportions (95% CI)a |
|---|---|---|---|
| Participants receiving medication during first year after diagnosis (N, %) | |||
| Thiazides | 19,372 (17%) | 4172 (24%) | 7 (6.3 to 7.7) |
| Alkali | 4882 (4%) | 2918 (17%) | 13 (12.0 to 13.1) |
| Allopurinol | 7526 (7%) | 1817 (11%) | 4 (3.4 to 4.3) |
| Difference from baseline in proportion of participants receiving medication (% absolute change) | |||
| Thiazides | 0.2 | 8 | 8 (6.9 to 8.4) |
| Alkali | 3 | 15 | 12 (11.7 to 12.8) |
| Allopurinol | 1 | 5 | 4 (3.4 to 4.4) |
a
Percentage difference in proportions is the proportion of patients with active prescription of medication in 1 yr after stone diagnosis or 24-h urine test minus the proportion of patients with active prescription of medication in 1 yr before stone diagnosis or 24-h urine test.