Risk of progression of proliferative diabetic retinopathy after panretinal laser photocoagulation according to global and focal retinal oxygen saturation
| Month 3 | Baseline | Month 3 | Difference (month 3–baseline) | ||||
| Increment | OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | |
| Global (n=42) | |||||||
| Arteriolar | 1.0% | 1.07 (0.92 to 1.24) | 0.376 | 1.08 (0.91 to 1.27) | 0.386 | 0.98 (0.77 to 1.26) | 0.892 |
| Venular | 1.0% | 0.99 (0.89 to 1.10) | 0.885 | 1.12 (0.98 to 1.28) | 0.087 | 1.30 (1.05 to 1.62) | 0.017* |
| Arteriovenular | 1.0% | 1.05 (0.94 to 1.18) | 0.390 | 0.95 (0.85 to 1.05) | 0.320 | 0.72 (0.55 to 0.94) | 0.016* |
| Focal (n=24) | |||||||
| Arteriolar | 1.0% | 0.86 (0.65 to 1.14) | 0.285 | 0.98 (0.83 to 1.15) | 0.768 | 1.30 (0.81 to 2.01) | 0.274 |
| Venular | 1.0% | 0.90 (0.75 to 1.09) | 0.290 | 1.00 (0.86 to 1.16) | 0.980 | 1.33 (0.88 to 1.99) | 0.173 |
| Arteriovenular | 1.0% | 1.02 (0.88 to 1.19) | 0.756 | 0.99 (0.86 to 1.13) | 0.835 | 0.89 (0.68 to 1.15) | 0.360 |
Multiple logistic regression model (adjusted for age, sex, duration of diabetes, HbA1c, and amount of laser energy) indicating risk of progression of proliferative diabetic retinopathy 3 months after panretinal laser photocoagulation according to level of retinal oxygen saturation at baseline, follow-up and between baseline and follow-up. Risk indicated as odds ratio (OR) with 95% confidence interval (CI). *Statistically significant.