Table 3 Relationship adjusted for age between AGF score and upper limb/hand function evaluation.

	FMA	STEF (more-affected)	STEF (less-affected)	ARAT (more-affected)	ARAT (less-affected)	MAL (AOU)	MAL (QOM)
AGF score on the more-affected side (g)
Total sections	− 0.13	− 0.34	0.29	− 0.47	− 0.06	− 0.45	− 0.31
Isometric sections	0.21	− 0.02	0.38	− 0.11	− 0.17	− 0.10	0.02
Concentric sections	− 0.13	− 0.34	0.29	− 0.47	− 0.06	− 0.45	− 0.31
Eccentric sections	− 0.11	− 0.01	0.29	− 0.28	− 0.44	− 0.23	− 0.06
AGF score on the less-affected side (g)
Total sections	0.17	0.04	− 0.40	− 0.13	− 0.55	− 0.08	0.15
Isometric sections	0.58	0.47	− 0.47	0.41	− 0.64*	0.50	0.65*
Concentric sections	0.22	0.08	− 0.24	− 0.01	− 0.43	− 0.02	0.27
Eccentric sections	0.27	0.19	− 0.23	− 0.02	− 0.55	0.01	0.22

Spearman’s rank correlation coefficients adjusted for age (r) are shown between AGF scores for each section (total, isometric, concentric, and eccentric) and upper limb functional measures (FMA, STEF, ARAT, and MAL). * = p < 0.05, ** = p < 0.01. Lower AGF scores indicate better AGF.
FMA: Fugl-Meyer Assessment, STEF: Simple Test for Evaluating Hand Function, ARAT: Action Research Arm Test, MAL: Motor Activity Log-14, AOU: amount of use, QOM: quality of movement, AGF: adjustability of grasping force.

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