Table 5.

Correlations between seasonal disease activities and Vit D (ng/ml), PTH (pg/ml), CRP (IU/ml) and ESH (mm/h) levels in patients with RA, AS and OA

	RA		AS		OA
	DAS-28 Summer	DAS-28 Winter	BASDAI-Summer	BASDAI-Winter	WOMAC-Summer	WOMAC-Winter
Vit-D Summer	−0.099	------	−0.195	------	0.215	------
Vit-D Winter	------	0.067	------	0.047	------	0.145
PTH-Summer	−0.189	------	0.095	------	0.112	-------
PTH-Winter	------	0.039	------	0.163	------	0.054
CRP-Summer	0.453**	------	0.181	------	0.293	------
CRP-Winter	------	0.396**	------	0.157	------	0.035
ESH-Summer	0.534**	------	0.028	------	0.201	------
ESH- Winter	------	0.571**	------	0.224	------	0.379*

^*p < 0.05, correlation significant at 0.05 level (two-tailed);

^**p<0.01, correlation significant at 0.01 level (two-tailed)