Research Article

Infections Requiring Hospitalization as Predictors of Pediatric-Onset Crohn’s Disease and Ulcerative Colitis

Figure 1

Odds ratios for hospitalized infections comparing Crohn’s disease cases with controls. Compared with controls using conditional logistic regression accounting for the matching factors: age and duration of membership as well as sex and race. Hospitalized infections were hospitalizations with diagnosis codes for infection in the principal diagnosis code position. Intestinal infections included ICD-9-CM codes 001-009 and 567. The index date was defined as the date of the case’s diagnosis for both cases and matched controls.