Table 3.

Cognitive performance.

Terms	CID (n = 76)	HC (n = 32)	P
MoCA-C (score)	25 (22, 26)	27 (25, 28)	<0.001
ORM (number of errors)	0 (0, 0)	0 (0, 0)	0.618
SRM (number of errors)	0 (0, 0)	0 (0, 0)	0.205
OWM (number of errors)	1 (0, 1)	0 (0, 1)	0.066
SWM (number of errors)	2 (1, 4)	1 (0, 2)	<0.001
ORcM (number of errors)	0 (0, 1)	0 (0, 0)	<0.01

Normal distribution variables (Mean ± SD).

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