Table 3.
Hazards ratio for the development of iridocorneal adhesion in the series of infants with treated retinopathy of prematurity.
| Variables | Comparison | Hazards ratio (HR) | 95% confidence interval | P value | Notes | |
|---|---|---|---|---|---|---|
| Low | High | |||||
| Categorical | ||||||
| Gender | Male to female | 1.13 | 0.17 | 7.29 | 0.8993 | |
| Laterality | Right to left | 1.50 | 0.67 | 3.34 | 0.3208 | |
| Retinal disease category | Zone 1 and plus to others | 1.50 | 0.29 | 7.60 | 0.6267 | |
| Zone 2, stage 2 with plus to others | 0.31 | 0.04 | 2.18 | 0.2403 | ||
| Vitreous hemorrhage to others | 2.81 | 0.96 | 8.27 | 0.0605 | ||
| Initial treatment modality | PRP to IVB | 0.12 | 0.02 | 0.84 | 0.0330 | ∗∗ |
| Additional treatment modalities | PRP to none | 12.64 | 1.30 | 122.50 | 0.0286 | ∗∗ |
| PRP + IVB to none | 79.17 | 6.73 | 931.70 | 0.0005 | ∗∗ | |
| PRP + IVB to PRP | 6.26 | 0.42 | 92.86 | 0.1824 | ||
| PRP to none or IVB | 17.07 | 1.97 | 148.10 | 0.0100 | ∗∗ | |
| IVB to none or PRP | 21.25 | 1.54 | 293.60 | 0.0225 | ∗∗ | |
|
| ||||||
| Continuous | Unit | |||||
| Gestational age | 1 week | 0.58 | 0.26 | 1.28 | 0.1757 | |
| Number of PRP spots | 250 spots | 0.47 | 0.20 | 1.10 | 0.0810 | |
| Number of injections | 1 injection | 3.47 | 1.46 | 8.24 | 0.0049 | ∗∗ |
HR = hazards ratio; PRP = panretinal photocoagulation; IVB = intravitreal bevacizumab injection. ∗∗P value <0.05.