Research Article

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

Figure 2

Odds ratios for hospitalized infections comparing ulcerative colitis 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. Nonintestinal infections were not reported as no UC patient experienced an intestinal infection requiring hospitalization.