Correlation between Treatment Outcomes and Serum Vitamin D Levels As Well As Infliximab Trough Concentration among Chinese Patients with Crohn’s Disease

Table 3

The influence of vitamin D levels at three-time points on Crohn’s disease activity index at the week 38 IFX treatment in Crohn’s disease patients (linear regression, enter) ().

		Unstandardized coefficients	Std. error	Standardized coefficients		Sig.	VIF
(Constant)		295.756	54.415		5.435	0
Vit-D status	Enrollment	-1.378	0.583	-0.324	-2.363	0.024	1.086
	Week 14	-0.929	0.599	-0.224	-1.549	0.13	1.206
	Week 38	-0.662	0.551	-0.181	-1.2	0.238	1.31
				5.681
				0.001
				0.394
Dependent variable: CDAI (IFX7)

Vit-D: vitamin D; CDAI: Crohn’s disease activity index; VIF: variance inflation factor.