Table 3.

The linear regression analysis between cognitive scores and age in stenosis group and control group separately.

Name of test	Stenosis			Controls
	p a	b b	a c	p a	b b	a c
Digit span test	0.043	−0.082	11.256	0.009	−0.065	10.118
Spatial span test	0.029	−0.038	7.22	0.690	−0.007	5.530
Stroop color-word test	0.021	−0.249	6.877	0.017	−0.223	42.496
Grammatical reasoning test	0.106	−0.068	4.444	0.015	−0.141	13.721
One back test	0.023	−0.344	40.865	0.018	−0.198	34.360
Identification test	0.001	−0.595	78.517	0.001	−0.369	66.426
Detection test	0.057	6.342d	674.395	0.221	5.922d	469.246

^aIn the results of variance analysis of linear regression equation, when p < 0.05, it can be considered that there is a linear regression relationship between cognitive scores and age.

^bb is the regression coefficient of the linear regression equation.

^ca is the constant of the linear regression equation.

^dFor the detection test, lower scores reflect better performance. Therefore, the regression coefficient is a positive number.