Table 4. Summary of additional analyses: Influence of variation within the sample.

Dependent Variable	RATE		FIX		LEFT		TOT
Effect	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value
Device	−18.3532	0.3829	−24.9336	<.0001	−26.3543	<.0001	−21.7398	<.0001
Crowding	−36.7951	0.0103	26.8898	<.0001	−0.1273	0.9262	−0.1732	0.905
Hand	2.8915	0.3092	3.3127	0.4401	0.7349	0.5978	−15.2919	0.0406
PD	2.008	0.0266	−3.2714	0.0072	−0.8358	0.0031
VAS	−4.6432	0.6601					0.8574	0.8805
VAS*Hand							5.3656	0.018
VAS*Crowding	8.5659	0.0417
SW	1.4986	0.0418
SW*Device	0.6903	0.0086

Device: (1 = POD, 0 = PAD); Crowding: (1 = SPACED, 0 = NORMAL); Hand: (1 = HAND, 0 = NO HAND).