Table 5.

Correlations Between DPP4 Activities, BDNF, and SIRT-1 vs Celluar Oxidative Stress and Apoptosis in Older Adults with MCI

Characteristics	Cognitive-Related Metabolic Parametersa
	DPP4 Activity		BDNF		SIRT1(ng/mL)
	r	P	r	P	r	P
NO	−0.128	<0.01	−0.32	<0.01	−0.56	<0.01
MDA	−0.18	<0.001	−0.23	<0.001	−0.58	<0.001
CAT	0.89	<0.001	0.76	<0.001	0.81	<0.001
SOD	0.48	<0.001	0.71	<0.001	0.56	<0.001
Bax	−0.31	<0.001	−0.43	<0.001	−0.48	<0.001
Bcl-2	0.36	<0.001	0.51	<0.001	0.42	<0.001
Caspase-3	−0.87	<0.001	−0.96	<0.001	−0.74	<0.001

Note: ^aP-value determined by partial correlation analysis with respect to the DPP4 activity, BDNF, DBR, cellular oxidative stress, and apoptosis adjusted for age, BMI, gender, education level, exercise levels, and working among older adults.