Parietal Fast Sleep Spindle Density Decrease in Alzheimer’s Disease and Amnesic Mild Cognitive Impairment

Table 1

Mean and standard errors (SE) of demographic (age, education) and clinical (Minimental State Examination (MMSE) scores, Hamilton Depression Rating Scales (HDRS) scores, State Trait Anxiety Index (STAI Y-1 and STAI Y-2) scores, Pittsburg Sleep Quality Index (PSQI) scores) characteristics of AD patients, amnesic MCI patients, and HC. The results of the one-way ANOVAs ( and values) were also reported, with post hoc unpaired -test ( values) when ANOVAs were significant (). Significant between-groups differences are indicated in bold.

Variables	AD	MCI	HC			AD versus MCI	AD versus HC	MCI versus HC
	Mean (SE)	Mean (SE)	Mean (SE)
Age (years)	70.80 (2.40)	71.10 (2.28)	70.80 (1.63)	0.005	0.99	—	—	—
Education (years)	9.4 (1.49)	12.4 (1.13)	11.8 (1.24)	1.51	0.23	—	—	—
MMSE	16.07 (1.10)	26.07 (0.53)	29.07 (0.27)	89.32	<0.0001	<0.0001	<0.0001	<0.0001
HDRS	9.62 (1.52)	7.87 (1.03)	6.33 (0.83)	2.07	0.14	—	—	—
STAI Y-1	40 (2.70)	32.87 (1.66)	32.33 (1.63)	4.37	0.02	0.03	0.02	0.82
STAI Y-2	41.92 (2.54)	38.4 (2.94)	33.8 (2.25)	2.40	0.10	—	—	—
PSQI	4.79 (0.65)	5.13 (0.99)	5.27 (0.50)	0.11	0.9	—	—	—