and women, the weighted prevalence increased with age;these effects were observed among all racial/ethnic groups(Table 3). Similar results were seen for the secondaryoutcome of symptomatic stone disease, although the pointestimates were slightly lower (Table 1).Variation in the prevalence of stone disease existedamong different racial/ethnic groups (Table 3). The prevalenceof stone disease was highest among non-Hispanicwhite individuals, at 10.3% (95% CI, 9.4–11.1). Other ethnic/racial groups had a lower prevalence of stone disease.Among Hispanic individuals, the prevalence of kidneystones was 6.4% (95% CI, 5.6–7.3), and among black,non-Hispanic individuals, the prevalence was 4.3%