Table 3. Spearman's rho (ρ) correlation between sleep questionnaire scores and beta-amyloid deposition in different brain regions.

Variables		Frontal lobe		Temporal lobe		Parietal lobe		Cingulate cortex
		Left	Right	Left	Right	Left	Right	Left	Right
GSES
	ρ	0.166	0.117	0.196	0.173	0.134	0.090	0.179	0.161
	Significance (2-tailed)	0.106	0.257	0.056	0.091	0.194	0.384	0.082	0.118
PSQI
	ρ	0.086	0.057	0.121	0.087	0.124	0.111	0.034	0.052
	Significance (2-tailed)	0.407	0.582	0.240	0.401	0.227	0.283	0.741	0.616
MEQ
	ρ	0.219	0.201	0.199	0.194	0.240	0.197	0.261*	0.275†
	Significance (2-tailed)	0.052	0.059	0.052	0.059	0.068	0.054	0.010	0.007

GSES: Glasgow Sleep Effort Scale, PSQI: Pittsburgh Sleep Quality Index, MEQ: Morningness-Eveningness Questionnaire.

^*Correlation is significant at the 0.05 level (2-tailed); ^†Correlation is significant at the 0.01 level (2-tailed).