Effects of bihemispheric transcranial direct current stimulation on motor recovery in subacute stroke patients: a double-blind, randomized sham-controlled trial

Table 3 Multivariate regression model coefficients for FMA-UE improvement

Variable	B	SE	β	p	VIF
From T1 to T2
Model for real group: R² = 0.77 (aR² = 0.72), p = 0.005
△FC_cM1-cS1	7.18	2.12	0.59	0.0094	1.08
△FC_iM1-iS1	12.75	4.41	0.51	0.02	1.08
Constant	15.29	1.05		< 0.001
Model for sham group: R² = 0.77 (aR² = 0.7), p = 0.006
△FC_iS1-iIPS	− 6.88	1.83	− 0.69	0.007	1
Age	− 0.21	0.08	− 0.51	0.028	1
Constant	20.57	4.84		0.004
From T1 to T3
Model for real group: R² = 0.96 (aR² = 0.95), p < 0.001
△FC_cS1-cPMd	− 18.89	2.19	− 0.82	< 0.001	1.39
△FC_iPMd-iIPS	− 5.02	1.81	− 0.26	0.032	1.39
Constant	14.05	0.52		< 0.001
Model for sham group: R² = 0.72 (aR² = 0.68), p = 0.002
△FC_iM1-iPMd	9.52	2.13	0.85	0.002
Constant	8.39	0.96		< 0.001

aR² adjusted R squared, cM1/iM1 contralesional/ispilesional primary motor cortex, cPMd/iPMd contralesional/ispilesional dorsal premotor cortex, cS1/iS1 contralesional/ispilesional primary somatosensory cortex, B unstandardized regression coefficient, β standardized beta coefficient, FMA-UE Fugl-Meyer Assessment of Upper Extremity, iIPS ispilesional intraparietal sulcus, SE standard error, VIF variance inflation factor

ISSN: 1743-0003