Table 2.

Fixed effects of characteristics based on results of a mixed model.

Characteristics	Class	Coefficient	S.E.	D.F.	t-value	P
Muscle	Trapezius	−0.08	0.19	80.2	−0.43	0.67
	Bicipital	−0.53	0.19	80.2	−2.75	0.01
	Brachioradialis	−0.22	0.19	80.2	−1.12	0.27
	FCU	ref	—	—	—	—
Location	Left	−0.07	0.19	80.2	−0.35	0.73
	Right	ref
Phase	AC	−0.19	0.07	265	−2.88	0.004
	SC	−0.17	0.07	265	−2.56	0.01
	DI	ref
Muscle * location	Trapezius * Left	−0.17	0.15	265	−1.13	0.26
	Bicipital * Left	0.65	0.15	265	4.3	<0.001
	Brachioradialis * Left	0.23	0.15	265	1.53	0.13