Table 2. Correlation between retinal structure, function and visual behavior at different concentrations of PQ.

The slope of the line of best fit, determined by regression analysis, is shown for comparisons between the structure (OCT), function (ERG) and visual behavior (OKT) of the retina at the various concentrations of PQ over the course of the three week time period. The slope indicates the relationship between the rates of degeneration across the two measurements being compared. The coefficient of determination (r²) indicates the variability in the difference between measurement techniques, with a higher r² indicating less variability.

Concentration	OCT vs a-wave		OCT vs b-wave		OCT vs OKT
	Slope	r2	Slope	r2	Slope	r2
0 mM	2232.5	0.117	3517.8	0.0441	0.0431	0.1262
0.2 mM	1382	0.2639	6470.5	0.2049	0.0408	0.2243
0.4 mM	4486.2	0.1495	14150	0.619	0.0349	0.3472
0.6 mM	2646.6	0.5376	7255.6	0.5412	0.0726	0.4128
0.8 mM	1698.4	0.6906	5296.9	0.5613	0.0829	0.512
1 mM	2086.4	0.6114	1742.3	0.1167	0.2095	0.5132
Concentration	OKT vs a-wave		OKT vs b-wave		b-wave vs a-wave
	Slope	r2	Slope	r2	Slope	r2
0 mM	275.75	0.117	−514.99	0.0625	0.4676	0.0351
0.2 mM	201.9	0.2639	616.07	0.2505	2.7425	0.7666
0.4 mM	136.96	0.1495	477.7	0.2015	2.6259	0.7641
0.6 mM	278.93	0.5376	635.92	0.3641	2.3881	0.7919
0.8 mM	221.11	0.6906	446.18	0.3064	2.103	0.4818
1 mM	745.52	0.6114	843.05	0.2443	0.9647	0.2978