Association Between Census Division, Patient Characteristics, and Utilization of CT as the First Imaging Study for Children With Nephrolithiasis

Base ModelFully Adjusted Model
OR95% CIOR95% CI
Census division
 South region
  West South CentralReferentReferentReferentReferent
  East South Central1.30*1.09–1.561.27*1.06–1.54
 South Atlantic0.960.84–1.100.930.80–1.07
  Northeast Region
  New England0.50*0.40–0.640.48*0.37–0.62
  Middle Atlantic0.70*0.58–0.840.69*0.57–0.83
 Midwest region
  East North Central0.970.84–1.120.950.81–1.10
  West North Central1.240.99–1.541.220.98–1.53
 West region
Year of evaluation
 2–5 yearsReferentReferent
 6–11 years3.68*2.81–4.81
 12–17 years8.61*6.66–11.13
Insurance type
  • West South Central: Arkansas, Louisiana, Oklahoma, and Texas; East South Central: Alabama, Kentucky, Mississippi, and Tennessee; South Atlantic: Delaware, District of Columbia, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, and West Virginia; New England: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont; Middle Atlantic: New Jersey, New York, and Pennsylvania; East North Central: Illinois, Indiana, Michigan, Ohio, and Wisconsin; West North Central: Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota; Mountain: Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming; Pacific: Alaska, California, Hawaii, Oregon, and Washington. *P < .05. CDHP, consumer-driven health plan; EPO, exclusive provider organization; HDHP, high-deductible health plan; HMO, health maintenance organization; POS, point of service; PPO, preferred provider organization.