Can Variability of Pattern ERG Signal Help to Detect Retinal Ganglion Cells Dysfunction in Glaucomatous Eyes?

Table 4

Pearson correlation coefficient (CC) and significance level (SL-) in 37 early manifest glaucoma patients.

		Age	IOP	CCT	MD	PSD	RNFL	GCC	Amplitude	Phase	CV_amp	CV_phase
			(mmHg)	(µm)	(dB)	(dB)	(µm)	(µm)	(µV)	( rad)	(%)	(%)
Age	CC		−0.108	−0.133	0.082	0.038	0.133	0.051	−0.181	−0.128	0.126	0.105
	SL-		0.523	0.433	0.629	0.823	0.432	0.762	0.284	0.449	0.457	0.536
IOP (mmHg)	CC	−0.108		0.269	0.078	−0.252	0.296	0.177	−0.251	−0.364	0.11	0.362
	SL-	0.523		0.108	0.646	0.133	0.075	0.294	0.134	0.026	0.516	0.0277
CCT (m)	CC	−0.133	0.269		−0.131	−0.108	0.181	0.019	0.043	−0.157	0.207	0.178
	SL-	0.433	0.108		0.441	0.526	0.282	0.908	0.8	0.352	0.218	0.292
MD (dB)	CC	0.082	0.078	−0.131		−0.465	0.117	0.05	0.025	0.011	−0.287	0.153
	SL-	0.629	0.646	0.441		0.0037	0.491	0.766	0.882	0.949	0.084	0.366
PSD (dB)	CC	0.038	−0.252	−0.108	−0.465		−0.386	−0.279	0.024	0.138	0.152	−0.524
	SL-	0.823	0.133	0.526	0.0037		0.018	0.0945	0.889	0.414	0.369	0.0009
RNFL (m)	CC	0.133	0.296	0.181	0.117	−0.386		0.636	0.444	−0.228	−0.05	0.427
	SL-	0.432	0.075	0.282	0.491	0.0184		<0.0001	0.005	0.175	0.768	0.0083
GCC (m)	CC	0.051	0.177	0.019	0.05	−0.279	0.636		0.24	−0.054	−0.379	0.361
	SL-	0.762	0.294	0.908	0.766	0.094	<0.0001		0.152	0.753	0.0206	0.0283
Amplitude (V)	CC	−0.181	−0.251	0.043	0.025	0.024	0.444	0.24		0.285	−0.32	−0.037
	SL-	0.284	0.134	0.8	0.882	0.889	0.0059	0.152		0.087	0.0536	0.828
Phase ( rad)	CC	−0.128	−0.364	−0.157	0.011	0.138	−0.228	−0.054	0.285		−0.346	−0.33
	SL-	0.449	0.0268	0.352	0.949	0.414	0.175	0.753	0.087		0.0358	0.0461
CV_amp (%)	CC	0.126	0.11	0.207	−0.287	0.152	−0.05	−0.379	−0.32	−0.346		0.09
	SL-	0.457	0.516	0.218	0.084	0.369	0.768	0.02	0.053	0.0358		0.597
CV_phase (%)	CC	0.105	0.362	0.178	0.153	−0.524	0.427	0.361	−0.037	−0.33	0.09
	SL-	0.536	0.0277	0.292	0.368	0.0009	0.0083	0.028	0.828	0.0461	0.597

Intraocular pressure (IOP), central corneal thickness (CCT), mean deviation (MD), pattern standard deviation (PSD), retinal nerve fiber layer thickness (RNFL), ganglion cell complex (GCC), PERG amplitude, PERG phase, coefficient of variation PERG amplitude (CV_amp), and coefficient of variation PERG phase (CV_Phase).