Table 2.
Inter-eye Relationship of Retinal Nerve Fiber Layer Thickness at the Papillomacular Bundle Among Infants with Data from Both Eyes
| Postmenstrual age | Number of Infants | RNFL Thickness in Right Eyes (μm) | RNFL Thickness in Left Eyes (μm) | RNFL Thickness in Right – Left Eyes (μm) | P for inter-eye difference in RNFL Thickness | r for inter-eye correlation in RNFL Thickness |
|---|---|---|---|---|---|---|
|
| ||||||
| 31 weeks | 21 | 54.9 ± 11.0 | 52.6 ± 11.5 | 2.3 (−0.2, 4.8) | 0.07 | 0.88 |
| 33 weeks | 50 | 55.8 ± 11.4 | 54.0 ± 10.3 | 1.8 (−0.1, 3.7) | 0.06 | 0.82 |
| 36 weeksa | 76 | 63.1 ± 11.7 | 59.7 ± 10.6 | 3.4 (1.7, 5.0) | < 0.001 | 0.80 |
| 39 weeks | 59 | 63.1 ± 10.5 | 61.6 ± 10.4 | 1.5 (−0.2, 3.2) | 0.07 | 0.81 |
| 41 weeks | 47 | 64.3 ± 10.9 | 62.2 ± 9.7 | 2.2 (0.4, 3.9) | 0.02 | 0.83 |
r = Pearson’s correlation coefficient; RNFL = retinal nerve fiber layer.
Values are mean ± standard deviation and mean (95% confidence interval).
a
Data at 36 weeks PMA were reported in our previous paper: Shen LL, Mangalesh S, McGeehan B, et al. Birth Weight Is a Significant Predictor of Retinal Nerve Fiber Layer Thickness at 36 Weeks Postmenstrual Age in Preterm Infants. Am J Ophthalmol. 2020 Sep 4;222:41–53.