Hazard ratios and confidence intervals for each risk factor in determining blindness.

IOP, intraocular pressure; MD, Mean Deviation; Final, at the end of follow up. Since the model used is a parametric accelerated failure model with a Weibull distribution, the hazard ratio depends on the scale parameter, which is different for each center due to stratification. The presented hazard ratios are a global calculation (i.e. with no strata) although the significance of the covariates was assessed with a stratified model. Hazard ratios and confidence intervals for each risk factor in determining blindness.