SmokingPrevention: Television School and Family Smoking Prevention and Cessation...

In mixor: Mixed-Effects Ordinal Regression Analysis

Description

From the Television School and Family Smoking Prevention and Cessation Project, a study designed to increase knowledge of the effects of tobacco use in school-age children.

Usage

data(SmokingPrevention)

Format

A data frame with 1600 observations on the following 9 variables.

school

a numeric vector identifying the Los Angeles school

class

a numeric vector identifying classroom

thksord

a numeric vector reflecting quartiles of the post-intervention tobacco and health knowledge scale scor

thksbin

a binary version of the post-intervention tobacco and health knowledge scale score

int

a numeric vector of ones; used in the stand-alone MIXOR program to represent the intercept

thkspre

the pre-intervention tobacco and health knowledge scale score

cc

a numeric vector indicating whether the school was randomized to a social-resistance classroom curriculum (1=Yes, 0=No

tv

a numeric vector indicating whether the school was randomized to a media (television) intervention (1=Yes, 0=No)

cctv

a numeric vector indicating whether the school was randomized to CC combined with TV

References

Flay B.R., Brannon B.R., Johnson C.A. et al. (1988) The television, school and family smoking cessation and prevention project: I. Theoretical basis and program development, Preventive Medicine 17, 585-607.

Hedeker D. and Gibbons R.D. (1996) A computer program for mixed-effects ordinal regression analysis. Computer Methods and Programs in Biomedicine 49, 157-176.

Hedeker D and Gibbons R.D. (2006) Longitudinal Data Analysis, Wiley, Hoboken, New Jesery.

Examples

library("mixor")
data("SmokingPrevention")
# sort dataset by id; note for these data sorting by class will also sort by school
SmokingPrevention<-SmokingPrevention[order(SmokingPrevention$class),]
# school model
Fitted.school<-mixor(thksord~thkspre+cc+tv+cctv, data=SmokingPrevention, 
     id=school, link="logit")
summary(Fitted.school)
vcov(Fitted.school)
# students in classrooms analysis; not run 
#Fitted.students<-mixor(thksord~thkspre+cc+tv+cctv, data=SmokingPrevention, 
#     id=class, link="logit")
#summary(Fitted.students)
#vcov(Fitted.students)

mixor documentation built on May 2, 2019, 5:56 a.m.