The Effect of the Idiopathic Epiretinal Membrane and Surgically Induced Posterior Vitreous Detachment on the Retinal Nerve Fiber Layer

Table 3

Retinal nerve fiber layer thickness (μm) change in the inferior quadrant of the groups.

	Group 1 (fellow eyes)		Group 2 (vitrectomized eyes)
	Mean ± SD	Median	Mean ± SD	Median
RNFL inferior
Preoperative	142.03 ± 6.26	141.40	145.36 ± 6.11	144.80	0.000
1^st month	142.03 ± 6.31	141.50	157.15 ± 6.95	156.05	0.000
Preoperative-1^st month change	0.00 ± 0.24	0.00	11.79 ± 1.83	11.85	0.000
Intergroup change	0.648		0.000
2^nd month	142.08 ± 6.34	141.70	159.01 ± 7.13	158.00	0.000
Preoperative-2^nd month change	0.05 ± 0.58	0.00	13.65 ± 2.17	13.55	0.000
Intergroup change	0.128		0.000
3^rd month	142.03 ± 6.33	141.40	159.41 ± 7.10	159.10	0.000
Preoperative-3^rd month change	0.00 ± 0.30	0.00	14.05 ± 2.35	13.65	0.000
Intergroup change	0.517		0.000
6^th month	142.04 ± 6.27	141.40	150.10 ± 8.48	150.20	0.000
Preoperative-6^th month change	0.01 ± 0.36	−0.05	4.73 ± 4.17	5.10	0.000
Intergroup change	0.412		0.000
12^th month	142.06 ± 6.31	141.20	139.67 ± 6.96	138.95	0.020
Preoperative-12^th month change	0.03 ± 0.40	−0.10	−5.69 ± 3.58	−5.35	0.000
Intergroup change	0.263		0.000

Wilcoxon test, RNFL- retinal nerve fiber layer, μm- micrometer, SD- standard deviation.