marijuana: Longitudinal data set on teenage marijuana use

In drm: Regression and association models for repeated categorical data

Description

This data set is from US National Youth Survey reporting a repeated questionnaire on marijuana use of 237 teenagers yearly from ages 13 to 17 on an ordinal scale.

Usage

data(marijuana)

Format

This data frame contains the following columns:

id

identification number of a teenager.

y

marijuana response, 1: never; 2: less than once a month; 3: more than once a month.

sex

a factor with levels female male

age

age as a factor with levels 13 14 15 16 17

Source

Lang, JB, McDonald, JW, Smith, PWF. (1999). Association marginal modelling of multivariate categorical responses: A maximum likelihood approach. JASA, 94, 1161-1171.

References

Jokinen J, McDonald JW, Smith PWF. Meaningful regression and association models for clustered ordinal data. Sociological Methodology 2006; 36:173-199.

drm documentation built on May 29, 2017, 7:24 p.m.