Table 2.

Adjusted estimates of group–level incidence rates of nephrolithiasis in South Carolina by age from 1997 to 2012: Model 1

Model 1: Age Group (yr)5-yr Change in Kidney Stone Incidence (95% CI)
<101.09 (0.98 to 1.22)
10–141.20 (1.12 to 1.28)
15–191.26 (1.22 to 1.29)
20–241.14 (1.11 to 1.17)
25–341.07 (1.05 to 1.08)
35–441.08 (1.07 to 1.09)
45–640.98 (0.97 to 0.99)
≥651.08 (1.07 to 1.10)
  • Model 1 included an interaction term between age and year. All models with interactions additionally included each main effect, lower–order interaction terms, and a random intercept for county of residence. Models examining for age and sex effects were adjusted for race. 95% CI, 95% confidence interval.