Table 3.

Ordinal logistic regression analyses of predictors of optimal image quality

Variable	Univariable ordinal logistic regression			Multivariable ordinal logistic regression (significant terms only)
	or	95% CI	P values	or	95% CI	P values
Distance to the optic nerve head	0.89	0.79 to 1.00	0.05	–	–	–
Distance to the fovea	0.76	0.68 to 0.88	<0.001	0.78	0.68 to 0.90	0.005
Choroidal pigmentation
Dark versus light	0.12	0.03 to 0.48	0.003	0.12	0.20 to 0.62	0.01
Dark versus medium	0.31	0.13 to 0.77	0.01	1.11	0.39 to 3.32	0.86
Medium versus light	0.37	0.09 to 1.48	0.16	0.11	0.02 to 0.65	0.01
Posterior pole location	3.87	1.60 to 9.40	0.003	–	–	–
Thickness measured using ultrasonography	0.44	0.20 to 0.96	0.04	–	–	–
Thickness measured using SS-OCT	1.00	1.00 to 1.00	0.84	–	–	–
Maximum diameter	0.73	0.61 to 0.87	<0.001	0.76	0.62 to 0.92	0.006

SS-OCT, swept-source optical coherence tomography; OR, odds ratio.