Molecular Vision: Hartong, Mol Vis 2009; 15:592-597. Table 1

Table 1. Patients included in high and low ERG amplitude groups.

Sample ID	Family ID	1° relative	Sex	Age (years)	Av30Hz ERG (μV)	T/S ratio
High ERG amplitude group
218–288	5938	218–289	f	34	81	0.430198
001–191	1566	-	m	38	76.0*	0.537613
218–289	5938	218–288	m	41	69.5	0.557743
226–1070	6149	226–1063	m	49	67.5	0.364527
226–1063	6149	226- 1070	m	51	51.5	0.350156
226–007	5850	218–005, 218–002	f	56	50	0.756707
218–309	6281	-	f	46	46	0.376173
226–685	5970	001–299	m	56	42.5	0.397979
001–299	5970	226–285	m	58	41.1	0.341629
226–638	6149	-	f	27	41	0.380276
218–243	6038	226–905	m	52	38	0.394993
226–905	6038	218–243	f	50	38	0.556106
001–385	6803	-	m	46	35.3	0.519532
218–282	5938	-	m	47	27.5	0.56872
218–280	E716	-	f	49	12.6	0.311241
Low ERG amplitude group
001–007	6994	-	f	34	2.3	0.364527
226–1426	5998	-	f	42	1.04	0.769996
001–162	6653	-	f	46	0.7	0.368992
218–003	5850	-	m	38	0.65	0.412048
001–390	1509	-	m	48	0.47	0.376173
218–005	5850	226–007, 218–002	m	55	0.3	0.608039
001–131	6281	-	m	43	0.3	0.355099
218–255	5938	001–387, 218–031	f	32	0.23	0.586807
001–089	6149	-	f	31	0.2*	0.799895
218–407	6888	-	f	62	0.17	0.274106
218–060	1566	-	f	62	0.16	0.340283
001–078	6038	-	m	49	0.15	0.197481
001–387	5938	218–255, 218–031	m	34	0.13*	0.651994
218–002	5850	226–007, 218–005	m	60	0.12	0.430762
218–031	5938	218–255, 001–387	m	41	0.08	0.638473

This table lists the 30 Hz cone ERG amplitudes averaged across both eyes (Av30Hz ERG) for the 15 patients included in the high ERG amplitude group (least severely affected) and the 15 patients included in the low ERG amplitude group (most severely affected) along with the relative telomere lengths (ie. T/S ratio) obtained for each patient, the patient’s age at phlebotomy, their gender and any first degree relatives also included in this study. Age ranges, gender distribution and T/S ratios were similar between the two groups whereas the 30 Hz ERG amplitudes were on average nearly 100 fold greater in the high ERG group than the low ERG group. Amplitudes marked with an * indicate that data was available for only one eye. All patients had reduced or nondetectable rod ERG amplitudes (data not shown); some still had normal cone ERG amplitudes (normal range=50–125 μV).