GSSE 401 - Asthma data

Description

The crossover data frame has 13 rows and 4 columns.

Usage

data(crossover)

Format

This data frame contains the following columns:

sequence

a factor with levels indicating the sequence of administration of drugs:

FS Formoterol first and Salbutamol second

SF Salbutamol first and Formotemol second

patient

a factor with patient identifier

PEF1

a numeric vector with measurements of the lung function in period one

PEF2

a numeric vector with measurements of the lung function in period two

Details

This data-set gives the results of a crossover trial into the effectiveness of two proprietary medicines used to treat chronic asthma. The medicines are Formoterol (F) and Salbutamol (S). Each patient receives both treatments in sequence, with an intervening "washout" period intended to ensure that the drug received in period 1 has no residual effect during period 2. The resonse is a measure of lung function, peak expiratory flow (PEF), 8 hours after treatment.

Source

Supplied by Prof S. Senn (University College, London, UK).