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Health Promot Perspect. 2021;11(2): 202-209.
doi: 10.34172/hpp.2021.25
  Abstract View: 215
  PDF Download: 177
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Original Article

Differentiating between girls and boys in transition through smoking stages: A sex-specific growth mixture modeling

Nasrin Jafari 1 ORCID logo, Asghar MohammadpourAsl 1 ORCID logo, Mohammad Asghari-Jafarabadi 1,2* ORCID logo

1 Department of Statistics and Epidemiology, Tabriz University of Medical Sciences, Tabriz, Iran
2 Center of the development of interdisciplinary research in Islamic sciences and health sciences, Tabriz University of Medical Sciences, Tabriz, Iran
*Corresponding Author: Mohammad AsghariJafarabadi, Email: m.asghari862@gmail. com

Abstract

Background: Smoking is a complex process, and adolescents pass through a number of different stages on the way to become smokers and it is sex-dependent.

Methods: In this cohort study, the illustrative samples of 10th-grade students (2241 girls and 2956 boys) were assessed using a multistage sampling in Tabriz, Iran. The main variables of the study were smoking status, intention to start smoking, and smoking during the past week/ month, which were collected using a valid and reliable instrument. Sex-specific GMMs were fitted to assess the transition through smoking stages.

Results: GMMs lead in a 2-class optimal model: “Occasional/Intending smokers” and “Non-smokers”. GMMs indicated that girls had lower levels of smoking status, intention to start smoking, smoking during the past week/month in both classes (significant and negative intercepts: -8.5 to -0.6). In addition, transitions toward higher levels of smoking status, intention to start smoking, smoking during the past week/month were observed in both classes for boys, but in the second class for girls (significant and positive slopes: 0.2 to 2.7).

Conclusion: This study highlighted the importance of stopping the initiation and avoiding transition through smoking stages with special sex-specific planning in the future.


Keywords: Sex-specific, Growth mixture models, Smoking stages, Adolescents, Transition

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Abstract View: 201

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Submitted: 09 Feb 2021
Accepted: 22 Mar 2021
ePublished: 19 May 2021
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