Table 6.

mfERG Values in Patients and Control Group

Amplitude P1/N1ratio	Ring	Eye	All patients	Control values	p-value	95%CI	Group 1a	Control values	p-value	95%CI
	Ring 1	RE	380 ± 209.6	528 ± 104,7	0.0334	[12.35 to 283.7]	298.6 ± 137.4	528 ± 104,7	0.0003	[120.8 to 338.0]
		LE	278.4 ± 100.1		< 0.0001	[175.5 to 323.7]	182.0 ± 64.13		< 0.0001	[268.8 to 423.2]
	Ring 2	RE	124 ± 39.30	122.8 ± 12.69	0.9222	–	89.99 ± 29.32	122.8 ± 12.69	0.0028	[12.72 to 52.90]
		LE	123.2 ± 42.59		0.9760	–	81.45 ± 27.35		0.0002	[22.39 to 60.31]
	Ring 3	RE	42.35 ± 10.95	56.47 ± 6.81	0.3031	–	32.55 ± 7.470	56.47 ± 6.81	< 0.0001	[18.56 to 31.28]
		LE	43.74 ± 10.10		0.3503	–	34.43 ± 6.273		< 0.0001	[17.21 to 28.87]
	Ring 4	RE	43.01 ± 12.77	35.85 ± 4.72	0.4736	–	31.11 ± 8.031	35.85 ± 4.72	0.1070	–
		LE	43.06 ± 11.62		0.4646	–	32.08 ± 8.246		0.2031	–
	Ring 5	RE	12.36 ± 3.20	19.76 ± 1.21	< 0.0001	[5.370 to 9.430]	9.479 ± 1.489	19.76 ± 1.21	< 0.0001	[9.074 to 11.49]
		LE	12.5 ± 3.0		< 0.0001	[5.349 to 9.171]	9.802 ± 1.929		< 0.0001	[8.526 to 11.39]

Data are presented as mean ± SD or as numbers. Amplitude P1/N1 ratio (nV/deg²). Ring 1 = < 2°; ring 2 = 2–5°; ring 3 = 5°–10°; ring 4 = 10°–15°; and ring 5 = > 15, RE right eye, LE left eye, CI confidence interval

^aGroup 1 is a subgroup of patients with evident visual disturbances in their visual field test. Patients with concentric constriction (17 eyes) and hemi-field defects (5 eyes) patterns