Table 4.

Bivariate correlation analyses between (A) plasma DPP4 activity and (B) soluble DPP4 concentration and covariates in the cohort individuals with and without US-assessed NAFLD (n = 126)

	A		B
	DPP4 activity		Soluble DPP4 concentration
	r coefficient	p value	r coefficient	p value
Age	0.13	0.15	0.16	0.14
Sex	0.08	0.37	0.09	0.44
BMI	0.16	0.08	0.23	0.51
Waist circumference	0.15	0.12	0.09	0.48
FBG	0.15	0.10	0.25	0.033
HbA1c	− 0.48	0.71	0.12	0.41
Total cholesterol	0.10	0.28	0.16	0.17
HDL	0.04	0.64	0.12	0.31
LDL	0.08	0.39	0.07	0.53
Triglycerides	0.11	0.21	− 0.005	0.96
AST	0.22	0.017	0.28	0.02
ALT	0.22	0.016	0.25	0.033
GGT	0.27	0.004	0.26	0.029
HOMA-IR	− 0.38	0.74	0.44	0.024
HOMA-β	− 0.11	0.34	0.31	0.13
T2DM	0.28	0.001	0.41	< 0.001
MS	0.20	0.019	0.27	0.015
NAFLD	0.28	0.001	0.24	0.036
FIB4	0.17	0.21	0.07	0.66

Plasma DPP4 activity and concentration are considered as continuous variables; r Spearman’s coefficient