Eye Disease Risk Factors data from Section 9.1 of Agresti's Analysis of Ordinal Categorical Data. The primary data are from the Wisconsin Epidemiological Study of Diabetic Retinopathy. The primary outcome is severity of retinopathy which was measured in the left and right eye of every subject.
data(eyedisease)A data frame with 720 observations on the following 19 variables.
rmeright eye macular oedema (absent = 0, present = 1)
lmeleft eye macular oedema (absent = 0, present = 1)
rreright eye refraction index
lreleft eye refraction index
riopright eye intraocular eye pressure
liopleft eye intraocular eye pressure
ageage
diabduration of diabetes (in years)
ghglycosylated haemoglobin level
sbpsystolic blood pressure
dbpdiastolic blood pressure
bmibody mass index
prpulse rate?
sexgender (male=1, female=2)
protproteinuria (absent = 0, present = 1)
dosea numeric vector
rerlright eye severity of retinopathy, an ordered factor with levels None < Mild < Moderate < Proliferative
lerlleft eye severity of retinopathy, an ordered factor with levels None < Mild < Moderate < Proliferative
idsubject identifier
R. Klein and B.E.K. Klein and S.E. Moss and M.D. Davis and D.L. DeMets. (1984) The Wisconsin Epidemiologic Study of Diabetic Retinopathy II. Prevalence and risk of diabetic retinopathy when age at diagnosis is less than 30 years. Archives of Opthalmology 101, 520-526.
J. Williamson and K. Kim. (1996) A global odds ratio regression model for bivariate ordered categorical data from opthalmologic studies. Statistics in Medicine 15: 1507-1518.
A. Agresti. (2010) Analysis of Ordered Categorical Data, Second Edition. Wiley. Hoboken, NJ.
See Also as ordinalgmifs