Comorbidities and systemic steroids drive pneumonia risk in inflammatory bowel disease: Propensity score-matched cohort study

Table 1 Summary of factors used for matching in propensity score models

Propensity score model	Factors used for matching
Base model	Age, sex, race/ethnicity, income status, educational attainment, current smoking status, and alcohol consumption, all 18 components of the CCI, use of systemic steroids, anti-TNF inhibitors, calcineurin inhibitors, and immunomodulators
Model 1	Age, sex, race/ethnicity, income status, educational attainment, current smoking status, and alcohol consumption
Model 2	Age, sex, race/ethnicity, income status, educational attainment, current smoking status, and alcohol consumption, all 18 components of the CCI
Model 3	Age, sex, race/ethnicity, income status, educational attainment, current smoking status, and alcohol consumption, use of systemic steroids, anti-TNF inhibitors, calcineurin inhibitors, and immunomodulators

CCI: Charlson Comorbidity Index; TNF: Tumor necrosis factor.