Table 4.

Correlations between 25(OH) vitamin D and disease activity, insulin resistance, and endothelial function in RA patients.

Correlation	RA patients
	Whole group	Moderate disease activity group	High disease activity group
25(OH) vitamin D-DAS28	r = −0.5253	r = −0.9072	r = −0.3198
	p = 0.0011	p = 0.046	p = 0.0397
25(OH) vitamin D-HOMA-IR	r = −0.3506	r = −0.9813	r = −0.3200
	p = 0.0389	p = 0.009	p = 0.0396
25(OH) vitamin D-FMD	r = 0.5287	r = 0.9001	r = 0.5144
	p = 0.0010	p = 0.049	p = 0.001