Table 4. Stepwise multiple linear regression of anandamide in the entire sample.

Variables	b	EP	β	P value	95% CI
Constant	0.69	0.17	-	< 0.001	0.35 a 1.03
Gender	0.06	0.06	0.07	0.30	-0.05 a 0.17
Age (years)	0.001	0.003	-0.002	0.98	-0.01 a 0.01
BMI (kg/m 2 )	0.01	0.004	0.21	0.007	0.003 a 0.02
hsCRP (nmol/L)	0.10	0.03	0.24	0.002	0.04 a 0.16
AA genotype	0.39	0.11	0.24	< 0.001	0.19 a 0.60

b, regression coefficient; EP, standard error of regression coefficient b; β, standard regression coefficient. P value, statistical significance of regression coefficient b; 95% CI, 95% confidence interval for regression coefficient b.

BMI, body mass index; hsCRP, high sensitive C reactive protein; AA genotype, presence of homozygous genotype AA in position 385 of FAAH.