Reproducibility of macular ganglion cell–inner plexiform layer thickness in normal eyes determined by two different OCT scanning protocols

Table 1 GCIPL thickness (Mean ± SD, μm) measured by two operators using macular cube 512 × 128 scanning protocol

Parameter	Operator	1st Measurement	2nd Measurement	3rd Measurement	P ^a	P ^b
Average	A	84.33 ± 5.76	84.27 ± 5.54	84.23 ± 5.63	0.991	0.846
Average	B	84.38 ± 5.58	84.42 ± 5.59	84.39 ± 5.64	0.999	0.846
Minimum	A	81.44 ± 5.61	81.65 ± 5.30	81.23 ± 5.76	0.859	0.850
Minimum	B	81.79 ± 5.72	81.71 ± 5.69	81.16 ± 5.97	0.689	0.850
Superotemporal	A	82.88 ± 5.29	82.82 ± 5.20	82.80 ± 5.42	0.993	0.938
Superotemporal	B	82.74 ± 5.41	82.73 ± 5.36	82.71 ± 5.35	0.999	0.938
Superior	A	85.48 ± 6.15	85.33 ± 5.90	85.38 ± 5.99	0.983	0.935
Superior	B	85.31 ± 5.88	85.31 ± 5.89	85.41 ± 5.93	0.992	0.935
Superonasal	A	87.06 ± 6.57	86.86 ± 6.40	86.77 ± 6.56	0.943	0.966
Superonasal	B	86.76 ± 6.37	86.88 ± 6.30	86.82 ± 6.43	0.990	0.966
Inferonasal	A	84.94 ± 6.46	84.96 ± 6.24	84.91 ± 6.06	0.998	0.847
Inferonasal	B	85.29 ± 6.13	85.17 ± 6.11	85.34 ± 6.39	0.978	0.847
Inferior	A	82.42 ± 6.25	82.44 ± 6.03	82.30 ± 6.07	0.982	0.792
Inferior	B	82.72 ± 6.20	82.73 ± 6.29	82.79 ± 6.38	0.996	0.792
Inferotemporal	A	83.27 ± 5.81	83.38 ± 5.67	83.34 ± 5.86	0.990	0.916
Inferotemporal	B	83.46 ± 5.68	83.56 ± 5.82	83.53 ± 5.91	0.991	0.916

^acomparison between the three repeated measurements of the GCIPL thickness measured by each operator
^bcomparison of the GCIPL thickness measured by the two operators

ISSN: 1471-2415