Table 2.
Comparison of the Retinal Nerve Fiber Layer (RNFL) Thickness Parameter in Normal and Perimetric Glaucoma (PG) Groups
| RNFL Thickness (μm) | Normal | PG | P Value* |
|---|---|---|---|
| Overall average | 99.3 ± 9.6 (74.6-131.4) | 77.9 ± 15.1 (41.9-127.5) | <0.0001 |
| Superior quadrant | 121.0 ± 15.0 (69.0-156.0) | 92.0 ± 22.5 (35.0-146.5) | <0.0001 |
| Nasal quadrant | 78.4 ± 16.3 (39.0-121.0) | 65.3 ± 16.1 (35.0-127.5) | <0.0001 |
| Inferior quadrant | 127.9 ± 15.8 (92.0-173.0) | 92.8 ± 25.3 (45.5-193.0) | <0.0001 |
| Temporal quadrant | 69.4 ± 13.7 (42.5-119.0) | 61.6 ± 16.9 (25.0-99.5) | 0.0004 |
| Clock hour 11 R/1 L | 130.0 ± 19.6 (75.0-183.5) | 97.8 ± 9.7 (35.5-172.5) | <0.0001 |
| Clock hour 12 R/12 L | 122.3 ± 22.7 (58.5-177.5) | 90.3 ± 31.6 (33.0-280.0) | <0.0001 |
| Clock hour 1 R/11 L | 109.9 ± 20.0 (53.0-164.5) | 89.0 ± 25.3 (33.0-160.5) | <0.0001 |
| Clock hour 2 R/10 L | 91.8 ± 21.2 (39.0-142.0) | 76.2 ± 21.0 (33.5-137.5) | <0.0001 |
| Clock hour 3 R/9 L | 65.1 ± 16.2 (35.0-114.0) | 54.5 ± 15.7 (30.5-123.0) | <0.0001 |
| Clock hour 4 R/8 L | 77.3 ± 17.7 (35.0-129.5) | 64.3 ± 7.8 (32.5-130.5) | <0.0001 |
| Clock hour 5 R/7 L | 109.4 ± 22.1 (52.0-168.0) | 86.3 ± 22.1 (32.0-205.0) | <0.0001 |
| Clock hour 6 R/6 L | 140.3 ± 25.2 (83.5-225.5) | 98.8 ± 30.6 (37.0-191.5) | <0.0001 |
| Clock hour 7 R/5 L | 133.9 ± 20.9 (83.0-190.5) | 93.3 ± 35 (26.5-184.5) | <0.0001 |
| Clock hour 8 R/4 L | 70.5 ± 15.8 (42.0-121.5) | 60.1 ± 7.9 (26.5-105.5) | <0.0001 |
| Clock hour 9 R/3 L | 54.6 ± 11.2 (33.0-101.5) | 53.0 ± 14.0 (18.0-88.5) | 0.4 |
| Clock hour 10 R/2 L | 83.5 ± 18.1 (48.0-153.5) | 72.5 ± 24.9 (24.0-139.5) | 0.0003 |
RNFL = retinal nerve fiber layer.
Parameter values are listed as mean ± standard deviation (range). The left eye (L) and right eye (R) clock-hour RNFL thickness parameters are combined assuming mirror symmetry.
*
Based on generalized estimating equations-adjusted 2-sided t test for a comparison between normal and PG groups.