Blackmore: Exercise Histories of Eating-Disordered and Control Subjects

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Exercise Histories of Eating-Disordered and Control Subjects

Description

The 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.

Usage

Blackmore

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.

Source

Personal communication from Elizabeth Blackmore and Caroline Davis, York University.

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. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1017/S0033291704003447")}

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