Table 3 Correlations of Z-SUM scores of the stroke core and perilesional regions with stroke severity, stroke volume, and cognitive performance

NIHSS

0.18

0.17

0.14

0.10

0.22

0.24

0.19

0.14

Stroke volume, %

0.73***†

0.69***†

0.63***†

0.56***†

0.41***†

0.51***†

0.55***†

0.54***†

MoCA

− 0.13

− 0.12

− 0.09

− 0.05

− 0.26*

− 0.29*

− 0.29*

− 0.24

NPI

0.14

0.12

0.09

0.05

0.20

0.21

0.22

0.19

Depressive symptoms^a

0.05

0.04

0.00

− 0.04

0.07

0.05

0.04

0.02

Anxiety^b

− 0.10

− 0.10

− 0.10

− 0.10

− 0.09

− 0.13

− 0.13

− 0.13

IADL

0.19

0.18

0.15

0.12

0.37**†

0.41***†

0.41**†

0.33**†

IQCODE^c

0.14

0.11

0.07

0.02

0.42***†

0.44***†

0.40**†

0.33**†

CDR-SOB

0.15

0.13

0.11

0.08

0.31*

0.37**†

0.37**†

0.29*†

 General cognitive function

− 0.26*

− 0.25*

− 0.23

− 0.21

− 0.27*

− 0.35**†

− 0.38**†

− 0.35**†

 Memory function

− 0.12

− 0.11

− 0.10

− 0.09

− 0.11

− 0.16

− 0.18

− 0.15

 Visuospatial function

− 0.18

− 0.18

− 0.17

− 0.16

− 0.28*

− 0.28*

− 0.27*

− 0.23

 Executive function

− 0.28*

− 0.27*

− 0.25

− 0.21

− 0.33**†

− 0.43***†

− 0.46***†

− 0.44***†

 Language function

− 0.31*

− 0.31*

− 0.30*

− 0.27*

− 0.22

− 0.28*†

− 0.31*†

− 0.30*†