Table 7.

Reliability of the instrumented exercises with clinical instruments

	Intra-rater reliability	Inter-rater reliability	Standard error of measurement	Minimal detectable change
Tapping (n)	.90**	.95**	.49	1.38
Tapping with the thumb while the remaining digits are weight-bearing (n)	.85**	.83**	1.30	3.62
Tapping with the index finger while the remaining digits are weight-bearing (n)	.90**	.87**	.97	2.69
Tapping with the middle finger while the remaining digits are weight-bearing (n)	.82**	.86**	1.45	4.00
Tapping with the ring finger while the remaining digits are weight-bearing (n)	.84**	.63*	1.39	3.85
Tapping with the little finger while the remaining digits are weight-bearing (n)	.90**	.82**	.65	1.79
Minimum pincer grasp with the index finger (cm)	.70**	.85**	.20	.54
Maximum pincer grasp with the index finger (cm)	.57*	.53*	.52	1.45
Minimum pincer grasp with the middle finger (cm)	.63**	.41*	.28	.77
Maximum pincer grasp with the middle finger (cm)	.77**	.80**	.35	.98
Minimum pincer grasp with the ring finger (cm)	.69**	.86**	.17	.47
Maximum pincer grasp with the ring finger (cm)	.68**	.57*	.42	1.16
Minimum pincer grasp with the little finger (cm)	.75**	.71**	.17	.47
Maximum pincer grasp with the little finger (cm)	.77**	.59*	.31	.84
Hand closing area (cm2)	.57*	.96**	.26	.71
Hand opening area (cm2)	.88**	.79**	.23	.63
Drawing an “M” (cm)	.60*	.75**	9.01	25.01
Drawing an “S” (cm)	.90**	.92**	2.09	5.79
Drawing a “3” (cm)	.94**	.83**	1.86	5.15
Drawing a spiral (cm)	.85**	.71**	10.58	29.33
Coordination with a finger (s)	.96**	.92*	.83	2.30
Coordination with a pen (s)	.53*	.83**	3.59	9.96
Coordination with a pen involving dropping and grasping (s)	.91**	.68*	2.15	5.96

Moderate or stronger correlations are highlighted in bold

*p < 0.05; **p < 0.01