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Assessing Differences in the Implementation of Smoke-Free Contracts—A Cross-Sectional Analysis from the School Randomized Controlled Trial X:IT

Author

Listed:
  • Lotus Sofie Bast

    (National Institute of Public Health, University of Southern Denmark, Studiestraede 6a, 1455 Copenhagen, Denmark)

  • Susan Andersen

    (National Institute of Public Health, University of Southern Denmark, Studiestraede 6a, 1455 Copenhagen, Denmark)

  • Stine Glenstrup

    (National Institute of Public Health, University of Southern Denmark, Studiestraede 6a, 1455 Copenhagen, Denmark)

  • Mogens Trab Damsgaard

    (National Institute of Public Health, University of Southern Denmark, Studiestraede 6a, 1455 Copenhagen, Denmark)

  • Anette Andersen

    (Steno Diabetes Center, Hedeager 3, 8200 Aarhus, Denmark)

Abstract

Objective: The X:IT study is a school-based smoking preventive intervention that has previously been evaluated in a large randomized controlled trial (RCT) with good effects. However, the actual effect for participating students depends on the individual implementation. The aim of this study was to examine the implementation of smoke-free contract, which is one of the three main intervention components. Specifically, we examined whether it was implemented equally across family occupational social class (OSC), separately for boys and girls, the joint effect of OSC and gender, and the participants’ own reasons for not signing a contract. Results: Overall, the smoke-free contract was well implemented; 81.8% of pupils (total N = 2.015) signed a contract (girls 85.1, boys 78.6%). We found a social gradient among girls; more than 90% were in OSC group I vs. 75% in group VI. Among boys, however, we found no difference across OSC. Boys in all the OSC groups had about half the odds (i.e., medium OSC boys: OR = 0.48 (95% CI: 0.32–0.72) of having a smoke-free contract compared to girls from a high OSC. Conclusion: future interventions should include initiatives to involve families from all OSC groups and allow for different preferences among boys and girls.

Suggested Citation

  • Lotus Sofie Bast & Susan Andersen & Stine Glenstrup & Mogens Trab Damsgaard & Anette Andersen, 2021. "Assessing Differences in the Implementation of Smoke-Free Contracts—A Cross-Sectional Analysis from the School Randomized Controlled Trial X:IT," IJERPH, MDPI, vol. 18(4), pages 1-7, February.
  • Handle: RePEc:gam:jijerp:v:18:y:2021:i:4:p:2163-:d:504142
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