Table 3.
Lid parameters of the study groups.
| Group 1 | Group 2 | Group 3 | Group 4 | Group 5 | Group 6 | |
|---|---|---|---|---|---|---|
| Gestational Age [Weeks] | GA ≥ 37 | GA 33–36 | GA 29–32 | GA ≤ 28 | GA ≤ 32 | GA ≤ 32 |
| no ROP | no ROP | no ROP | ROP | Treated ROP | ||
| Available lid measurements Participants/eyes (n) | 134/268 | 125/245 | 64/125 | 14/28 | 29/50 | 8/15 |
| Palpebral fissure (mm) OD | 9.52 ± 1.11 | 9.41 ± 1.43 | 9.39 ± 1.19 | 9.25 ± 1.03 | 9.5 ± 1.17 | 8.85 ± 1.97 |
| Palpebral fissure (mm) OS | 9.17 ± 1.19 | 8.98 ± 1.56 | 9.11 ± 1.27 | 8.61 ± 1.41 | 9.36 ± 2.35 | 8.39 ± 2.34 |
| Nasal palpebral angle (degree) OD | 53.86 ± 6.83 | 52.46 ± 7.62 | 52.92 ± 8.78 | 51.43 ± 8.48 | 51.8 ± 6.41 | 47.88 ± 10.52 |
| Nasal palpebral angle (degree) OS | 53.47 ± 7.42 | 51.72 ± 7.6 | 52.49 ± 8.6 | 50.79 ± 6.93 | 47.68 ± 5.39 | 46.86 ± 13.23 |
| Bulbar area OD | 11.3 ± 4.3 | 10.9 ± 5.0 | 11.1 ± 4.9 | 10.4 ± 3.1 | 9.6 ± 2.5 # | 8.8 ± 3.6 |
| Bulbar area OS | 11.2 ± 4.6 | 9.8 ± 5.2 | 10.3 ± 5.2 | 9.7 ± 4.1 | 9.4 ± 4.4 | 8.1 ± 2.3 # |
GA—gestational age; ROP—retinopathy of prematurity; mm—millimeter; OD—right eye; OS—left eye. Linear regression analysis was applied to compare the different groups with the full-term control group (reference). Categorical data were compared using the chi-square test with the full-term group as reference. # statistical difference (p < 0.05) compared to the control group.