Table 3.

Pearson correlation coefficients for mean baseline SPARCC MRI scores and baseline disease activity variables^*

Variable	SI joint score (n = 182)	Spine score (n = 181)
BASDAI	−0.187†	−0.030
ASDAS‡	0.022	0.123
Total back pain	−0.105	−0.069
Patient's global assessment of disease activity	−0.096	0.017
BASFI§	−0.105	0.043
Inflammation (morning stiffness)¶	−0.028	<0.001
Nocturnal back pain	−0.082	0.063
C-reactive protein (pooled)#	0.094	0.142

^*MRI = magnetic resonance imaging (see Table2 for other definitions).

^†P = 0.01.

^‡n = 175 for SI joint score, and n = 174 for spine score.

^§n = 181 for SI joint score, and n = 180 for spine score.

^¶Mean of items 5 and 6 of the BASDAI.

^#Includes both standard and high-sensitivity C-reactive protein values.