Table 3.

Adjusted estimates of group–level incidence rates of nephrolithiasis in South Carolina by sex from 1997 to 2012: Model 2

Model 2: Sex 5-yr Change in Kidney Stone Incidence (95% Confidence Interval)
Females1.15 (1.14 to 1.16)
Males0.99 (0.98 to 1.00)
  • Model 2 included an interaction term between sex 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.