Table 3.

The Cognitive Performance

Variables	CID (N = 57)	HC (N = 30)	p-value
MoCA-C (score)	25.00(23.00, 27.00)	26.00(26.00, 27.00)	0.006
ORM (number of errors)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.222
SRM (number of errors)	0.00 (0.00, 1.00)	0.00 (0.00, 0.00)	0.065
OWM (number of errors)	1.00 (0.00, 1.50)	0.00 (0.00, 0.25)	0.002
SWM (number of errors)	3.00 (2.00, 4.00)	1.00 (1.00, 2.00)	<0.001
ORcM (number of errors)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.022

Notes: Normal distribution variables (Mean ± SD); nonnormal distribution variables (P50 [P25, P75]).

Abbreviations: CID, chronic insomnia disorder; HC, healthy controls; MoCA-C, Chinese-Beijing Version of Montreal Cognitive Assessment; ORM, object reference memory; SRM, spatial reference memory; OWM, object working memory; SWM, spatial working memory; ORcM, object recognition memory.