Table 1.

Correlation between BASDAI, BASFI, and other clinical parameters in AS

	BASDAI		BASFI
	R	P	r	P
Age at onset (years)	0.072	0.072	0.056	0.162
Duration (years)	0.149	0.000	0.145	0.000
Occipital wall distance (cm)	0.159	0.000	0.308	0.000
Modified Schober’s test (cm)	−0.214	0.000	−0.308	0.000
Chest expansion (cm)	−0.183	0.000	−0.227	0.000
ESR (mm/h)	0.263	0.000	0.295	0.000
CRP (mg/L)	0.231	0.000	0.359	0.000

r Spearman’s correlation coefficient