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Analysis of the risk factors for severe retinopathy requiring laser photocoagulation using multivariate Cox proportional hazards models
| Variable | Hazard ratio (95% CI) | p value |
|---|---|---|
| Older age at onset | 1.15 (1.03–1.29) (per year) | 0.012 |
| Female gender | 4.03 (1.20–13.5) | 0.024 |
| Higher median HbA1c during the observational period | 2.05 (1.69–2.49) (per %) | <0.0001 |
Laser photocoagulation was analyzed as a time-dependent covariant
