Table 2:
Prevalence of qualitative optical coherence tomography features in preterm infants at 36 weeks postmenstrual age
| Feature# | N= 85 infants | Laterality among infants with the feature in at least one eye ** |
||
|---|---|---|---|---|
| Not Present N (%) |
Present in at least one eye N (%) |
Bilateral N (%) |
Unilateral N (%) |
|
| Vitreous pathologies | 65 (76.5%) | 19 (22.6 %) | 9 (47.4 %) | 10 (52.6 %) |
| Pre-retinal neovascularization | 84 (98.8%) | 1 (1.2 %) | 1 (100 %) | 0 (0 %) |
| Macular Edema | 33 (39.8%) | 50 (60.2 %) | 41 (82 %) | 9 (18 %) |
| Mild | 18 (21.7 %) | 9 (50 %) | 9 (50 %) | |
| Moderate | 19 (22.9 %) | 18 (94.7 %) | 1 (5.3 %) | |
| Severe | 13 (15.7 %) | 8 (61.5 %) | 5 (38.5 %) | |
| Elongated cystoid spaces | 54 (65.9%) | 28 (34.1 %) | 17 (60.7 %) | 11 (39.3 %) |
| ELM at foveal center | 79 (95.2%) | 4 (4.8 %) | 2 (50 %) | 2 (50 %) |
| EZ band at foveal center | 84 (98.8%) | 1 (1.2 %) | 1 (100 %) | 0 (0 %) |
| Photoreceptor bulging | 55 (64.7%) | 30 (35.3 %) | 22 (73.3 %) | 8 (26.7 %) |
| Retinoschisis | 84 (98.8%) | 1 (1.2 %) | 1 (100 %) | 0 (0 %) |
| Retinal detachment | 85 (100.0%) | 0 (0 %) | 0 (0 %) | 0 (0 %) |
ELM: external limiting membrane; EZ: ellipsoid zone
**
one subject with only one pre-treatment eye removed from laterality analysis
#
Some features could not be determined or graded in the following number of eyes: 4 (vitreous pathologies), 6 (macular edema), 12 (elongated cystoid spaces), 6 (ELM), 6 (photoreceptor bulging), 1 (retinal detachment)