The recovery data contains information on 60 children after a surgery.
Usage
data(recovery)
Format
A data frame with 240 observations on the following 10 variables
y
recovery score
Dos1
Dosage=15 (yes = 1, no = 0)
Dos2
Dosage=20 (yes = 1, no = 0)
Dos3
Dosage=25 (yes = 1, no = 0)
Age
Age of child (in months)
Age2
Squared age
Dur
Duration of surgery (in minutes)
Rep1
First repetition (yes = 1, no = 0)
Rep2
Second repetition (yes = 1, no = 0)
Rep3
Third repetition (yes = 1, no = 0)
Person
ID-Variable for each child (1–60)
Details
In a randomized study 60 children undergoing surgery were treated with
one of four dosages of an anaesthetic (15, 20, 25, 30). Upon admission to the
recovery room and at minutes 5, 15 and 30 following admission,
recovery scores were assigned on a categorical scale ranging from 1
(least favourable) to 6 (most favourable). Therefore one has four
repetitions of a variable having 6 categories. One wants to model
how recovery scores depend on covariables as dosage of the
anaesthetic (four levels), duration of surgery (in minutes) and age
of the child (in months).
References
Davis, C.S. (1991) Semi-parametric and Non-parametric Methods for the
Analysis of Repeated Measurements with Applications
to Clinical Trials. Statistics in Medicine 10, 1959–1980