Table 1.

P-values obtained from general linear models investigating the RPI parameters as dependent variables, and age, direction and quadrant as independent variables

	TID	IDI	CID1	ED1	US1	LS1	avgCID	avgED	avgUS	avgLS
Age	0.002	<0.0001	0.003	<0.0001	<0.0001	0.025	0.778	0.657	<0.0001	<0.0001
Direction	0.016	0.054	<0.001	0.436	0.001	0.002	<0.0001	<0.0001	<0.0001	<0.0001
Quadranta
_ medial	0.031	0.026	0.197	0.230	0.530	0.135	0.708	0.068	0.628	0.960
_ lateral	0.056	0.002	0.143	0.208	0.457	0.026	0.800	0.637	0.545	0.460
_ posterior	0.059	0.567	0.292	0.557	0.449	0.433	0.515	0.734	0.366	0.845
Direction*Age	NI	NI	NI	NI	0.031	NI	NI	NI	NI	0.013
Quadrant*Agea
_ medial	0.017	NI	0.133	0.094	NI	NI	NI	NI	NI	NI
_ lateral	0.006		0.033	0.027
_ posterior	0.115		0.254	0.539

^acompared to the anterior quadrant

^binteraction terms were not included (NI) because their contribution was not significant.

Note that Quadrant*Direction*Age was never significant.