Table 3
Mean retinal nerve fibre layer (RNFL) thickness (μm)by age groups in white and Afro-Caribbean groups
| Age group | White (n) | Afro-Caribbean (n) | RNFL White | RNFL Afro-Caribbean | p Value* | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (mean (1 SD)) | (range) | (mean (1 SD)) | (range) | |||||||||
| 1 | 1 | 5 | — | — | 92.5 (5.5) | 83.5–97.9 | — | |||||
| 2 | 4 | 3 | 95 (5.3) | 87–98.6 | 80.4 (5.8) | 75.5–86.5 | 0.05 | |||||
| 3 | 8 | 9 | 84.7 (5.4) | 78.2–92.4 | 75.2 (5.9) | 67.3–84.1 | 0.01 | |||||
| 4 | 5 | 12 | 84.5 (14.1) | 60.3–96.9 | 74.2 (6.2) | 63.5–84.0 | 0.06 | |||||
| 5 | 8 | 1 | 82.1 (10.5) | 72.2–105.3 | — | — | — | |||||
| 6 | 12 | 9 | 74.4 (4.5) | 68.6–81.0 | 69.8 (6.4) | 59.3–77.6 | 0.11 | |||||
| 7 | 9 | 8 | 82.5 (9.6) | 68.2–97.6 | 66 (4.9) | 61.1–75.7 | <0.001 | |||||
| 8 | 12 | 4 | 69 (3.6) | 63.7–77.5 | 60.6 (5.6) | 55.4–68.2 | 0.02 | |||||
-
Measurements are derived from retardation measurements, 1 degree retardation corresponds to approximately 7.4 μm.*Mann–Whitney U test for the comparison of groups.
