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Trend analysis of cigarette smoking by Indiana adolescents, 1991-2000
Kele Ding1, Mohammad R Torabi, William J Bailey
1Idaho State University, USA.
Objectives:
To examine the feasibility of using a composite index of smoking behaviors to analyze adolescent smoking.
Methods:
A secondary analysis of data from 10 annual surveys (1991-2000), from 566,467 Indiana students in grades 6 through 12. A composite index was calculated, and differences between index scores were analyzed using 1-way ANOVA, Tukey's post hoc tests, and 2-way moving averages.
Results:
Index scores increased before 1997 and decreased after 1976, with greater change among 7th through 10th graders.
Conclusions:
The 2-way moving average comparison of a composite index, used with prevalence-based trend analyses, provides a more complete picture of changes in adolescent cigarette smoking.