Table 2.

Spearman's rank correlation between fatigue measures and study variables.

	BASDAI-F		SF-36 VT
	Correlation coefficient	p-value	Correlation coefficient	p-value
Age	−0.069	0.269	0.162	0.037
Education	−0.158	0.028	0.116	0.174
Housing	−0.083	0.254	0.114	0.185
BMI	0.100	0.115	0.069	0.385
Duration of disease	0.031	0.617	0.005	0.948
BASMI10	0.070	0.256	−0.079	0.311
Swollen joint count	0.108	0.081	−0.135	0.083
Clinically damaged joints	−0.028	0.648	−0.200	0.010
SPARCC enthesitis index	0.196	0.001	−0.178	0.021
ESR	0.046	0.495	−0.059	0.479
BASDAI-axial pain	0.529	<0.001	−0.346	<0.001
BASDAI-peripheral pain	0.289	<0.001	−0.414	<0.001
BASDAI-morning stiffness	0.347	<0.001	−0.376	<0.001
BAS-G	0.468	<0.001	−0.424	<0.001
BASFI	0.427	<0.001	−0.449	<0.001
ASQoL	0.335	<0.001	−0.634	<0.001

BMI, body mass index; BASMI₁₀, Bath Ankylosing Spondylitis Metrology Index; SPARCC, Spondyloarthritis Research Consortium of Canada; ESR, erythrocyte sedimentation rate; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BAS-G, Bath Ankylosing Spondylitis Global Score; BASFI, Bath Ankylosing Spondylitis Functional Index; ASQoL, Ankylosing Spondylitis Quality of Life.