Table 1. P values for testing group mean differences between groups.

	P value
Comparison	ΔVrel, L	ΔVrel, R	ΔSL	ΔSR
MZ vs. NR	0.0537	0.0514	0.0013	0.0006
MZ vs. DZ	0.82	0.71	0.0082	0.0399
MZ vs. DS	0.18	0.42	0.28	0.68
DS vs. NR	0.0033	0.011	0.018	0.0026
DS vs. DZ	0.069	0.70	0.25	0.24
DZ vs. NR	0.057	0.027	0.050	0.016

Values significant at the 5% level are printed in boldface.