CCL20 and inflammatory bowel disease: However, an independent and significant association of IBD diagnosis [β (95% CI) = 0.394 (0.197, 0.590), p < 0.0001] and VD deficiency [β (95% CI) = 0.168 (0.006, 0.329), p = 0.042] with elevated CCL20 levels was confirmed in the multivariable model after adjusting for age [β (95% CI) = 0.0086 (0.002, 0.015), p = 0.0070] and BMI [β (95% CI) =  − 0.0035 (− 0.022, 0.015), p = 0.71] as additional covariables and including both IBD and VD deficiency in the analysis (Table 2).