recovery {catdata}

Post-Surgery Recovery of Children

Description

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