tvsfp: Subset of data from the Television School and Family Smoking...

In ALA: Data sets and examples for the book "Applied Longitudinal Analysis"

Description

The Television, School and Family Smoking Prevention and Cessation Project (TVSFP) was a study designed to determine the efficacy of a school-based smoking prevention curriculum in conjunction with a television-based prevention program, in terms of preventing smoking onset and increasing smoking cessation.

Usage

data(tvsfp)

Format

A data frame with 3200 observations on the following 7 variables.

id

a factor with 1600 levels

school

a factor with 28 levels

class

a factor with 135 levels

school.based

a factor with levels no and yes

tv.based

a factor with levels no and yes

stage

a factor with levels pre and post, indicating whether observation is before or after randomization

THKS

a numeric vector

Details

The study used a 2 X 2 factorial design, with four intervention conditions determined by the cross-classification of a school-based social-resistance curriculum (CC: coded 1 = yes, 0 = no) with a television-based prevention program (TV: coded 1 = yes. 0 = no). Randomization to one of the four intervention conditions was at the school level, while much of the intervention was delivered at the classroom level. The original study involved 6695 students in 47 schools in Southern California. This dataset consists of a subset of 1600 seventh-grade students from 135 classes in 28 schools in Los Angeles. The response variable, a tobacco and health knowledge scale (THKS), was administered before and after randomization of schools to one of the four intervention conditions. The scale assessed a student's knowledge of tobacco and health.

Note

Original variable names have been adapted to R conventions. Data were reshaped from wide to long format and the response named THKS. A new ID column was added, relative to the source.

Source

http://biosun1.harvard.edu/~fitzmaur/ala

References

Flay BR, Miller TQ, Hedeker D, Siddiqui O, Brannon BR, Johnson CA, Hansen WB, Sussman S, Dent C (1995) The television, school and family smoking prevention and cessation project: VIII. Student outcomes and mediating variables. Preventive Medicine 24:29-40

Examples

str(tvsfp)
summary(tvsfp)

ALA documentation built on May 2, 2019, 5:39 p.m.