Table 1.

Results of the t-test for the comparison between the slopes obtained with SPG and the NCPG.

Segment	System	Mean of Slope	SD of Slope	t-Value	p-Value
Segment 1	SPG	2.24 × 10−2	1.01 × 10−2	−3.11	5.47 × 10−3
	NCPG	3.80 × 10−2	1.32 × 10−2
Segment 3	SPG	1.85 × 10−3	9.63 × 10−4	3.21	4.38 × 10−3
	NCPG	7.14 × 10−4	6.76 × 10−4