Table 3.

Correlation between serum, CSF, and synovial fluid NAE/endocannabinoid levels (Spearman correlation coefficients).

	PEAser	OEAser	AEAser	2-AGser	PEAcsf	OEAcsf	AEAcsf	2-AGcsf	PEAsyn	OEAsyn	AEAsyn	2-AGsyn
PEAser	1	-	-	-	-	-	-	-	-	-	-	-
OEAser	0.80c	1	-	-	-	-	-	-	-	-	-	-
AEAser	0.57c	0.67c	1	-	-	-	-	-	-	-	-	-
2-AGser	−0.14	−0.06	0.22	1	-	-	-	-	-	-	-	-
PEAcsf	−0.22	−0.02	0.17	0.16	1	-	-	-	-	-	-	-
OEAcsf	−0.07	0.06	0.02	0.08	0.53b	1	-	-	-	-	-	-
AEAcsf	0.54b	0.49b	0.36a	−0.10	−0.36a	−0.13	1	-	-	-	-	-
2-AGcsf	0.14	0.06	0.12	−0.03	0.05	0.00	0.12	1	-	-	-	-
PEAsyn	0.62c	0.32	0.36	0.08	−0.48a	−0.18	0.57b	0.33	1	-	-	-
OEAsyn	0.56b	0.30	0.27	0.18	−0.42	−0.11	0.55b	0.36	0.88c	1	-	-
AEAsyn	−0.23	−0.46a	0.04	0.28	0.05	−0.28	−0.11	0.07	0.15	0.29	1	-
2-AGsyn	−0.08	−0.10	−0.02	0.45a	−0.17	−0.10	0.00	0.05	0.13	0.33	0.20	1

^ap < 0.05

^bp < 0.01

^cp < 0.0001