Table 3.

Effect of age, interocular difference (right eye–left eye) in refractive error and disc size on interocular differences in optical coherence tomography parameters.

	Age		Refractive error		Disc size
	Standardized beta	P value*	Standardized beta	P value*	Standardized beta	P value*
Average RNFL thickness	0.022	0.685	0.314	< 0.001	− 0.109	0.057
Average GCIPL thickness	0.012	0.828	0.366	< 0.001	0.065	0.254
Rim area	− 0.020	0.716	0.206	< 0.001	0.474	< 0.001
Average cup-to-disc ratio	− 0.027	0.637	− 0.011	0.847	0.627	< 0.001
Vertical cup-to-disc ratio	− 0.033	0.566	− 0.035	0.538	0.584	< 0.001
Cup volume	− 0.004	0.943	− 0.016	0.776	0.576	< 0.001

RNFL retinal nerve fiber layer, GCIPL ganglion cell-inner plexiform layer.

*Linear regression analysis.