Long-term visual pathway alterations after elemental mercury poisoning: report of a series of 29 cases

Table 4 PERG in Patients and Control Group

PERG			All patients	Control values	p-values	Group 1^a	Control values	p-values	95%CI
P50	Amplitude (μV)	RE	4.32 ± 1.51	4.92 ± 1.66	4.92 ± 1.66	3.13 ± 0.67	4.92 ± 1.66	0.0014	[0.76 to 2.81]
P50	Amplitude (μV)	LE	4.35 ± 1.78	4.58 ± 0.91	4.58 ± 0.91	2.93 ± 0.81	4.58 ± 0.91	0.0232	[0.21 to 2.61]
N95	Amplitude (μV)	RE	−5.90 ± .293	− 6.65 ± 2.06	−6.65 ± 2.06	−4.00 ± 0.84	−6.65 ± 2.06	0.0006	[−4.01 to 1.27]
N95	Amplitude (μV)	LE	−5.19 ± .460	−5.65 ± 1.63	−5.65 ± 1.63	−3.19 ± 0.94	−5.65 ± 1.63	0.0002	[−3.60 to 1.31]

Data are presented as mean ± SD or as numbers. Amp amplitude, PERG pattern electroretinogram, CI confidence interval, μV microvolts, RE right eye, LE left eye
^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

ISSN: 1745-6673