Table 2.
Comparisons of mean thickness of superior and inferior hemispheres between OHT and early POAG groups.
| Layer | Hemisphere | OHT (Microns) | Early POAG (Microns) | Difference of Means (Microns) | p |
|---|---|---|---|---|---|
| mRNFL | Superior | 42.58 ± 7.19 | 35.11 ± 7.98 | 7.47 | <0.001 |
| Inferior | 37.25 ± 7.43 | 32.04 ± 5.72 | 5.21 | <0.001 | |
| GCL | Superior | 30.98 ± 2.94 | 28.75 ± 3.65 | 2.23 | 0.001 |
| Inferior | 30.68 ± 3.17 | 28.97 ± 3.54 | 1.71 | 0.09 | |
| IPL | Superior | 25.67 ± 2.34 | 24.57 ± 2.40 | 1.10 | 0.016 |
| Inferior | 26.25 ± 2.38 | 25.25 ± 2.38 | 0.99 | 0.032 | |
| INL | Superior | 30.60 ± 2.32 | 31.49 ± 2.45 | −0.88 | 0.055 |
| Inferior | 30.43 ± 2.52 | 31.53 ± 2.67 | −1.09 | 0.029 | |
| OPL and ONL | Superior | 76.58 ± 4.93 | 78.07 ± 6.46 | −1.49 | 0.169 |
| Inferior | 81.23 ± 5.08 | 82.41 ± 6.54 | −1.17 | 0.286 | |
| PRL | Superior | 75.95 ± 2.52 | 77.21 ± 2.65 | −1.25 | 0.012 |
| Inferior | 77.31 ± 2.51 | 78.35 ± 2.62 | −1.04 | 0.036 | |
| RPE | Superior | 12.30 ± 1.18 | 12.64 ± 1.19 | −0.33 | 0.138 |
| Inferior | 12.65 ± 1.36 | 12.84 ± 1.35 | −0.19 | 0.460 |
The values represent mean ± standard deviation. Student’s t-test was used for independent samples. Significant thinning in early POAG are indicated in blue. Significant thickenings in early POAG are indicated in red. Significance is indicated in bold. Mrnfl = macular retinal nerve fiber layer; GCL = Ganglion cell layer; IPL = Inner plexiform layer; INL = Inner nuclear layer; OPL and ONL = combination of outer plexiform layer and outer nuclear layer; PRL = photoreceptor layer; RPE = Retinal pigment epithelium. The difference of means corresponds to OHT-POAG.