Table 3:

Cognitive Performance by % SWS

	High SWS (N3% > 15.8%)	Low SWS (N3% ≤ 15.8%)	t/U	p
Composite Cognitive Score†‡	0.16 (−0.07 – 0.44)	−0.22 (−0.75 – 0.11)	60.5	0.01
Attention/Working Memory Domain#	0.47 ± 0.58	−0.01 ± 0.78	−1.90	0.07
Memory Domain‡	0.24 ± 1.11	−0.24 ± 0.81	−1.40	0.17
Executive Function Domain	0.11 ± 0.72	−0.85 ± 1.07	−2.97	0.006
Language Domain	0.27 ± 0.93	−0.59 ± 0.87	−2.67	0.012
Visuospatial Skills Domain†	−0.47 (−0.79 – 0.48)	0.02 (−0.54 – 0.40)	95.00	0.22
Processing Speed Domain†##	0.48 ± 0.89	−0.48 ± 0.84	−3.17	0.003
MDS Task Force Criteria N with PD-MCI (%)	7 (44%)	13 (81%)	2.30	0.029
MoCA	25.62 ± 2.58	23.87 ± 2.70	−1.87	0.07
WTAR	0.89 ± 0.68	0.44 ± 1.03	−1.45	0.16

^#N=15 for both groups;

^##N=15 for low N3%;

^†domain corrected for sex;

^‡domain corrected for education

Median and IQR (interquartile range) are reported for variables not normally distributed, group differences examined using Mann-Whitney U, exact significance test.

MoCA: Montreal Cognitive Assessment; WTAR: Wechsler Test of Adult Reading; PD-MCI: Parkinson’s disease-mild cognitive impairment