Table 4.

Correlation coefficients and p-values between clinical variables and tracer uptake in the SI joint. NaF uptake correlated positively with body mass index (BMI) and leptin and inversely with sclerostin. FDG uptake correlated inversely with VAS-PtGlobal.

SI Joint	FDG SUVmean		NaF SUVmean
	R-Value	p-Value	R-Value	p-Value
Age	−0.055	0.827	−0.423	0.091
Weight	0.087	0.732	0.379	0.134
Height	0.302	0.224	−0.295	0.250
BMI	−0.111	0.661	0.536	0.027
Leptin	−0.442	0.066	0.592	0.012
Sclerostin	−0.038	0.882	−0.506	0.038
Total Fat	−0.125	0.623	0.462	0.062
CRP	0.325	0.189	0.231	0.372
ESR	0.215	0.407	0.113	0.677
IL-1	0.248	0.321	−0.170	0.515
IL-6	0.335	0.175	−0.190	0.465
DAS28-CRP	−0.459	0.055	0.249	0.336
VAS-PtGlobal	−0.650	0.003	0.113	0.666