Unadjusted rate ratios of outpatient visits of 3- to 8-year-old children of military parents based on parental deployment, according to clinical category. Point estimates and 95% CIs are depicted for effect of deployment versus nondeployment derived from unadjusted negative binomial regression using longitudinal data analysis. Clinical categories were determined by primary ICD-9 codes classified by the CCS of the Agency for Healthcare Research and Quality.