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Forest plot showing the coefficients from a multivariable linear regression model of associations with pretreatment vitamin D concentrations. The resultant values represent the change in vitamin D concentrations associated with each variable. CRP, C-reactive protein; HBI, Harvey Bradshaw Index; sPCDAI, short pediatric Crohn’s disease activity index. †Sampling during the summer was defined as a blood sample obtained in the months of June, July, and August.
