Comparisons of sectionalised RNFL thickness between different age groups
| Segment | Age | |||||
| <39 (N=352) | 40–49 (N=1728) | 50–59 (N=2095) | 60–69 (N=1647) | ≥70 (N=550） | P value | |
| RNFL thickness (μm) | ||||||
| Average | 115.22±10.88 | 115.90±10.25 | 113.95±10.34 | 111.47±10.75 | 107.80±12.54 | <0.001 |
| Superior | 143.28±19.00 | 145.29±17.89 | 141.81±17.76 | 137.96±18.39 | 133.22±19.47 | <0.001 |
| Nasal | 85.05±14.78 | 85.14±14.63 | 84.53±15.01 | 83.42±16.05 | 81.23±16.22 | <0.001 |
| Inferior | 149.61±17.31 | 150.14±17.27 | 147.73±16.89 | 144.67±17.50 | 139.40±19.56 | <0.001 |
| Temporal | 83.06±12.54 | 83.03±12.27 | 81.76±12.32 | 79.84±12.00 | 76.98±14.60 | <0.001 |
| ONH parameters | ||||||
| Rim area (mm2) | 1.69±0.38 | 1.68±0.47 | 1.69±0.47 | 1.67±0.49 | 1.71±0.55 | 0.615 |
| Disc area (mm2) | 2.37±0.43 | 2.39±0.48 | 2.43±0.51 | 2.44±0.48 | 2.49±0.53 | <0.001 |
| Average CDR (mm2) | 0.33±0.13 | 0.33±0.13 | 0.34±0.13 | 0.34±0.13 | 0.33±0.14 | 0.549 |
| Cup volume (mm3) | 0.13±0.15 | 0.15±0.19 | 0.15±0.18 | 0.14±0.17 | 0.13±0.17 | 0.228 |
| Axial length (mm) | 22.95±1.19 | 22.98±0.94 | 22.83±0.93 | 22.75±0.86 | 22.69±0.80 | <0.001 |
Statistics presented: mean±SD; n (%).
Values with statistical significance are shown in boldface.
CDR, cup-to-disc ratio; ONH, optic nerve head; RNFL, retinal nerve fibre layer.