Comparison of Individual Retinal Layer Thicknesses after Epiretinal Membrane Surgery with or without Internal Limiting Membrane Peeling

Table 3

Difference in segmented retinal layer thicknesses and best-corrected visual acuity before and at 6 months after epiretinal membrane surgery.

Difference	P group (ILM peeling)	value (preop vs POD 6 month)	NP group (non-ILM peeling)	value (preop vs POD 6 month)	value (P group vs NP group)
Total retinal thickness (µm)	−87.51 ± 9.87	<0.0001	−97.95 ± 8.35	<0.0001	0.425
RNFL thickness (µm)	−62.79 ± 11.43	<0.0001	−46.84 ± 9.21	<0.0001	0.283
GCL thickness (µm)	−10.26 ± 1.91	<0.0001	−19.86 ± 2.74	<0.0001	0.004
IPL thickness (µm)	−11.92 ± 1.89	<0.0001	−15.03 ± 2.37	<0.0001	0.306
INL thickness (µm)	−5.03 ± 2.49	0.050	−7.89 ± 3.29	0.022	0.486
OPL thickness (µm)	−2.77 ± 1.71	0.114	−7.16 ± 1.58	0.002	0.064
ONL thickness (µm)	3.26 ± 5.29	0.542	−1.89 ± 4.88	0.721	0.478
PRL thickness (µm)	1.21 ± 0.77	0.126	1.22 ± 0.82	0.194	0.992
RPE thickness (µm)	0.92 ± 0.93	0.326	0.41 ± 0.78	0.672	0.672
BCVA (logMAR)	−0.11 ± 0.02	<0.0001	−0.11 ± 0.03	0.006	0.950

BCVA = best-corrected visual acuity; POD = postoperative day; SD = standard deviation; ILM = internal limiting membrane; RNFL = retinal nerve fiber layer; GCL = ganglion cell layer; IPL = inner plexiform layer; INL = inner nuclear layer; OPL = outer plexiform layer; ONL = outer nuclear layer; PRL = photoreceptor layer; RPE = retinal pigment epithelium. Independent Student’s t-test for statistical analysis between Group 1 and Group 2 for difference of retinal layers and BCVA: . Paired sample t-test within Group 1 and Group 2 for statistical analysis: .