Table 2.

Summary data for dependent variables used in the linear and robust regression models.

		NCI	MCI	AD	Shapiro–Wilk p-value*
Dataset 1
	Trk2 Expression	1.93 ± 0.55	1.12 ± 0.54	0.92 ± 0.30	0.002
		2.06 (1.56, 2.21)	0.87 (0.69, 1.67)	0.76 (0.71, 1.03)
	Entorhinal Cortex NFT Count	10.62 ± 9.99	24.13 ± 19.13	35.00 ± 20.43	<0.001
		5.00 (2.75, 20.00)	20.00 (12.75, 31.75)	34.00 (22.75, 42.25)
Dataset 2
	Cyano-PiB Load	1.47 ± 2.12	1.16 ± 1.00	6.11 ± 5.73	<0.001
		0.12 (0.00, 3.02)	0.88 (0.23, 1.99)	3.93 (1.89, 8.47)
	X-34 Load	1.84 ± 2.47	2.24 ± 1.64	7.83 ± 7.21	<0.001
		0.45 (0.00, 4.01)	2.13 (1.74, 2.67)	5.60 (1.96, 12.13)

NCI, no cognitive impairment; MCI, mild cognitive impairment; AD, Alzheimer’s disease; mean ± standard deviation; median (interquartile range); *p-values that are <0.05 indicate the data do not meet the assumption of normality.