retinopathy data contains information on persons with retinopathy.
A data frame with 613 observations on the following 5 variables.
RET=1: no retinopathy, RET=2 nonproliferative retinopathy, RET=3 advanced retinopathy or blind
SM=1: smoker, SM=0: non-smoker
diabetes duration in years
glycosylated hemoglobin measured in percent
diastolic blood pressure in mmHg
Bender and Grouven (1998), Using binary logistic regression models for ordinal data with non-proportional odds, J. Clin. Epidemiol., 51, 809–816.
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