Table 3.

Neuropsychological test results of the iNPH patient subgroups by CSF Aβ42 level before CSF drainage (N = 18, A) and change before and after CSF drainage (N = 10, B)

	(A)			(B)
	Lower CSF Aβ42	Higher CSF Aβ42	P	Lower CSF Aβ42	Higher CSF Aβ42	p
	(n = 7)	(n = 11)		(n = 5)	(n = 5)
Attention
Digit span forward test	4.7 ± 1.1	6.2 ± 1.4	0.018*	0.2 ± 1.3	-0.6 ± 0.8	0.131
Digit span backward test	2.0 ± 1.5	2.7 ± 1.1	0.271	0.0 ± 0.7	-0.2 ± 0.8	0.911
Language function
K-BNT	25.3 ± 6.6	36.1 ± 14.3	0.157	2.4 ± 6.5	0.6 ± 3.6	0.602
Visuospatial function
RCFT Copy	12.8 ± 10.7	23.7 ± 12.5	0.043*	0.1 ± 4.5	-1.0 ± 2.1	0.577
Memory function
SVLT immediate recall	6.8 ± 1.9	13.3 ± 3.6	0.009*	2.0 ± 3.0	4.2 ± 3.8	0.117
SVLT delayed recall	0.1 ± 0.3	1.8 ± 2.0	0.204	0.0 ± 0.0	2.0 ± 1.8	0.054
SVLT recognition	15.5 ± 2.9	15.9 ± 4.0	0.820	-1.0 ± 4.1	1.4 ± 2.8	0.602
RCFT immediate recall	2.9 ± 4.3	7.9 ± 6.7	0.129	-0.8 ± 2.5	2.2 ± 3.5	0.245
RCFT delayed recall	1.8 ± 2.8	6.6 ± 6.2	0.232	0.3 ± 2.3	3.0 ± 3.2	0.245
RCFT recognition	16.0 ± 3.3	16.9 ± 3.1	0.480	-2.6 ± 3.2	2.0 ± 3.0	0.465
Frontal function
Contrasting program	15.0 ± 8.3	14.2 ± 9.1	0.691	-0.2 ± 0.4	0.2 ± 0.4	0.180
Go-no go	9.6 ± 10.2	11.0 ± 9.1	0.499	3.2 ± 8.9	2.8 ± 6.2	0.451
Semantic COWAT	6.3 ± 3.9	8.8 ± 6.1	0.269	-1.4 ± 3.3	5.4 ± 6.1	0.117
Phonemic COWAT	10.0 ± 6.0	14.4 ± 11.4	0.926	-1.0 ± 1.7	5.4 ± 6.1	0.018*
Stroop test: color reading	26.0 ± 13.2	44.5 ± 35.9	0.905	-4.4 ± 9.5	8.2 ± 8.1	0.008*

Continuous variables are presented as mean ± standard deviation. iNPH: Idiopathic Normal Pressure Hydrocephalus; AD: Alzheimer’s Disease; K-BNT: Korean version of Boston Naming Test; RCFT: Rey Complex Figure Test; SVLT: Seoul Verbal Learning Test; COWAT: Controlled Oral Word Association Test.