Table 1.

Mean ± SD values of demographics and MMSE (Mini Mental State Examination) scores in the three groups. Note: 3 AD patients had no MMSE scores; Montreal Cognitive Assessment (MoCA) scores were converted to MMSE [30] for these 3 patients.

	RNE	pAD	AD
N	11	15	11
Age (yrs)	$74.1\pm 6.8$	$74.6\pm 6.9$	$78.5\pm 7.5$
Sex	7F, 4M	5F, 10M	4F, 7M
Education (yrs)	$15.8\pm 2.8$	$16.8\pm 2.8$	$14.6\pm 2.6$
MMSE	$29.7\pm 0.5$	$26.9\pm 2.0$ *	$22.9\pm 2.8$ ${}^{\#}$

* $p<0.05$: RNE vs. pAD, ${}^{\#} p<0.05$: pAD vs. AD.