hips {faraway}

Ankylosing Spondylitis

Description

Data from Royal Mineral Hospital in Bath. AS is a chronic form of arthritis. A study conducted to determine whether daily stretching of the hip tissues would improve mobility. 39 “typical” AS patients were randomly allocated to control (standard treatment) group or the treatment group in a 1:2 ratio. Responses were flexion and rotation angles at the hip measured in degrees. Larger numbers indicate more flexibility.

Format

A data frame with 78 observations on the following 7 variables.

fbef

flexion angle before

faft

flexion angle after

rbef

rotation angle before

raft

rotation angle after

grp

treatment group - a factor with levels control treat

side

side of the body - a factor with levels right left

person

id for the individual

Source

Chatfield C. (1995) Problem Solving: A Statistician's Guide, 2ed Chapman Hall.

Examples

data(hips)
## maybe str(hips) ; plot(hips) ...