Table 4.

Associations of Magnitude and MagnitudeD with rim area (mm²), controlling for disc area (mm²).

	Step 1 (disc area)		Step 2 (Magnitude)
	ΔR2	B (95% CI)	ΔR2	B (95% CI)	R 2	SE
Rim area (mm2)	0.002	0.021 (−0.137, 0.179)	0.268a	0.174 (0.065, 0.283)	0.270a	0.053
	Step 1 (disc area)		Step 2 (MagnitudeD)
	ΔR2	B (95% CI)	ΔR2	B (95% CI)	R 2	SE
Rim area (mm2)	0.002	0.021 (−0.137, 0.179)	0.252a	0.160 (0.056, 0.265)	0.255a	0.051

Steps of the regression are shown separated by the columns. ΔR² is the change in R², B (95% CI) is the B coefficient and 95% confidence interval ranges, R² for total R² of the model, and SE is the standard error of the estimate of the final model. ^ap < 0.01.