Table 7.

Adjusted estimates of group–level incidence rates of nephrolithiasis in South Carolina by age and race from 1997 to 2012: Model 6

Model 6: Age Group (yr)5-yr Change in Kidney Stone Incidence among Whites (95% Confidence Interval)5-yr Change in Kidney Stone Incidence among Blacks (95% Confidence Interval)5-yr Change in Kidney Stone Incidence among Other Races (95% Confidence Interval)
<101.11 (0.99 to 1.24)1.23 (0.89 to 1.69)0.53 (0.15 to 1.93)
10–141.21 (1.13 to 1.29)1.15 (0.89 to 1.50)0.94 (0.51 to 1.72)
15–191.25 (1.20 to 1.28)1.37 (1.23 to 1.52)1.70 (1.34 to 2.16)
20–241.13 (1.10 to 1.15)1.30 (1.22 to 1.38)1.15 (1.02 to 1.31)
25–341.05 (1.04 to 1.07)1.21 (1.16 to 1.26)1.13 (1.04 to 1.21)
35–441.06 (1.05 to 1.07)1.20 (1.16 to 1.25)1.26 (1.18 to 1.36)
45–640.95 (0.94 to 0.96)1.05 (1.02 to 1.07)1.63 (1.52 to 1.73)
≥651.06 (1.04 to 1.07)1.17 (0.83 to 1.65)2.44 (1.68 to 3.53)
  • Model 6 included an interaction term between race, 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 race effects were adjusted for age and sex.