The Diabetic Retinopathy Data

Description

The data was colleceted to test a laser treatment for delaying blindness in patients with dibetic retinopathy. The subset of 197 patiens given in Huster et al. (1989) is used.

Format

This data frame contains the following columns:

id

a numeric vector. Patient code.

agedx

a numeric vector. Age of patient at diagnosis.

time

a numeric vector. Survival time: time to blindness or censoring.

status

a numeric vector code. Survival status. 1: blindness, 0: censored.

trteye

a numeric vector code. Random eye selected for treatment. 1: left eye 2: right eye.

treat

a numeric vector. 1: treatment 0: untreated.

adult

a numeric vector code. 1: younger than 20, 2: older than 20.

Source

Huster W.J. and Brookmeyer, R. and Self. S. (1989) MOdelling paired survival data with covariates, Biometrics 45, 145-56.

Examples

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