Factors associated with improvement or decline in cognitive function after an ischemic stroke in Korea: the Korean stroke cohort for functioning and rehabilitation (KOSCO) study

Table 2 Cognitive change divided by age from 3 months to 12 months

Age	Group	n (%)	Cognitive Change		3 months after onset	12 months after onset
Age	Group	n (%)	n (%)		K-MMSE (mean ± SD)	K-MMSE (mean ± SD)
Total Subjects (n = 2,625)	Normal Cognition	1,735 (66.1)	Stable	1,430 (82.4)	28.09 ± 2.66	28.14 ± 2.75
			Converter	93 (5.4)	23.67 ± 3.60	27.41 ± 3.19
			Reverter	212 (12.2)	26.81 ± 3.53	22.00 ± 4.80
	Declined Cognition	890 (33.9)	Stable	472 (53.0)	16.14 ± 9.81	16.42 ± 10.09
			Converter	321 (36.1)	17.87 ± 9.81	24.11 ± 5.69
			Reverter	97 (10.9)	16.34 ± 7.27	11.03 ± 7.46
Older age (n = 1,431)	Normal Cognition	835 (58.4)	Stable	612 (73.3)	26.86 ± 3.41	26.88 ± 3.50
			Converter	79 (9.5)	23.18 ± 3.69	27.01 ± 3.30
			Reverter	144 (17.2)	25.85 ± 3.82	20.66 ± 4.90
	Declined Cognition	596 (41.6)	Stable	336 (56.4)	14.46 ± 9.71	14.68 ± 9.95
			Converter	183 (30.7)	15.95 ± 7.64	22.46 ± 5.78
			Reverter	77 (12.9)	16.08 ± 7.09	10.52 ± 7.21

n, Number; SD, Standard Deviation; K-MMSE, Korean Mini Mental State Examination

ISSN: 1471-2377