Table 3

Subgroup analysis of factors influencing the final visual acuity in the amblyopic eye

Subgroup	Factor	R² (%)	β	95% CI for β	Standardised β	t statistic	Significance
R² statistic expressed as a percentage denotes the amount of variability in the final vision that this particular factor accounts for.
Correlation coefficient β is expressed in standard deviations to allow direct comparison of the gradients of the relative slopes.
Strabismic hypermetropes (n=49)	Spherical equivalent in amblyopic eye	0.164 (16%)	0.065	0.02 to 0.11	0.405	3.07	p<0.01
	Anisometropia	0.025 (3%)	0.032	−0.02 to 0.09	0.160	1.12	p=0.27
	Age at presentation	0.000 (<1%)	−0.002	−0.48 to 0.43	−0.016	−0.11	p=0.91

Non-strabismic hypermetropes (n=48)	Spherical equivalent in amblyopic eye	0.156 (16%)	0.048	0.02 to 0.08	0.395	2.92	p<0.01
	Anisometropia	0.174 (17%)	0.055	0.02 to 0.09	0.417	3.11	p<0.01
	Age at presentation	0.000 (<1%)	−0.001	−0.03 to 0.03	−0.006	−0.04	p=0.97

Non-strabismic myopes (n=11)	Spherical equivalent in amblyopic eye	0.714 (71%)	0.055	0.03 to 0.08	0.845	4.74	p=0.001
	Anisometropia	0.774 (77%)	0.084	0.05 to 0.12	0.880	5.55	p<0.001
	Age at presentation	0.001 (<1%)	−0.006	−0.13 to 0.12	−0.036	−0.11	p=0.92