Exercise Histories of Eating-Disordered and Control Subjects
Blackmore.RdThe Blackmore data frame has 945 rows and 4 columns. Blackmore and Davis's data on
exercise histories of 138 teenaged girls hospitalized for eating disorders and 98 control
subjects.
Format
This data frame contains the following columns:
- subject
a factor with subject id codes. There are several observations for each subject, but because the girls were hospitalized at different ages, the number of cases and the age at the last case vary.
- age
subject's age in years at the time of observation; all but the last observation for each subject were collected retrospectively at intervals of two years, starting at age 8.
- exercise
the amount of exercise in which the subject engaged, expressed as estimated hours per week.
- group
a factor with levels:
control, Control subjects;patient, Eating-disordered patients.
Note
The original version in package carData states there are 98 control subjects, but the
actual data only have 93 unique values, and that assuming subject id codes with suffixes
a and b represent different individuals; otherwise, there are just 87.
References
Davis C, Blackmore E, Katzman DK, Fox J. (2005). Female adolescents with anorexia nervosa and their parents: a case-control study of exercise attitudes and behaviours. Psychological Medicine 35(3):377-386. doi:10.1017/S0033291704003447