Table 2.

Values for Baseline and Final Optical Coherence Tomography–Derived Metrics for Study Subjects With RPGR-Associated Retinopathy

	Right Eyes (N = 32)			Left Eyes (N = 32)
	Baseline (Mean ± SD)	Final (Mean ± SD)	Intraocular Comparison	Baseline (Mean ± SD)	Final (Mean ± SD)	Intraocular Comparison
EZW (μm)	2438 ± 1646	1901 ± 1423	P < .0001	2420 ± 1758	1922 ± 1482	P < .0001
Nasal ONL thickness (μm)	66.4 ± 11.9	59.1 ± 10.4	P < .0001	66.6 ± 11.3	61.0 ± 10.9	P = .0036
Temporal ONL thickness (μm)	66.3 ± 9.0	59.4 ± 8.8	P = .0006	64.4 ± 11.1	58.0 ± 8.6	P = .0003
Nasal IRL thickness (μm)	105.8 ± 46.5	104.0 ± 49.5	P = .9851	110.8 ± 45.2	103.2 ± 45.0	P = .0042
Temporal IRL thickness (μm)	102.4 ± 45.9	105.1 ± 44.8	P = .0958	102.7 ± 43.6	99.1 ± 42.9	P = .1238

EZW = ellipsoid zone width; IRL = inner retinal layer; OCT = optical coherence tomography; ONL = outer nuclear layer; SD = standard deviation.

Two-tailed Wilcoxon signed rank test was used to investigate differences between baseline and final values with significance level alpha set at 0.05.