1 Minnesota Department of Health, St. Paul, MN, USA.
2 University of Minnesota, Minneapolis, MN, USA.
Health Educ Behav. 2018 Aug;45(4):550-558. doi: 10.1177/1090198117749258. Epub 2017 Dec 19.
It is a priority to develop population-based strategies for reducing barriers to smoking cessation among low-income populations. Harnessing secondary transmission such as interpersonal communication (IC) has helped to reduce tobacco use, but there is a dearth of quasi-experimental research that examines IC and the full spectrum of smoking cessation behaviors, particularly in the context of population-level programs.
Using quasi-experimental methods, we examined IC in response to a population-level intervention and its impact on the full spectrum of smoking cessation outcomes among low-income smokers.
We used propensity score matching; three different propensity score matching procedures were used to estimate and approximate experimental effects. We assessed four cessation outcomes: utilization of a free tobacco quitline (QL), making a quit attempt, and being smoke-free for 7 and 30 days at follow-up. We also examined predictors of IC.
IC was significantly related to QL utilization (effect sizes ranging from 0.135 to 0.166), making a quit attempt (effect sizes ranging from 0.115 to 0.147), being smoke-free for 7 days (effect sizes ranging from 0.080 to 0.121), and being smoke-free for 30 days at follow-up (effect sizes ranging from 0.058 to 0.082). Program-related and participant characteristics predicted IC, such as receiving emotional direct mail materials and living with a fellow smoker.
IC in response to a population-based program affected the cessation process, and IC had a marked impact on sustained cessation.
Population-based programs should aim to harness psychosocial dynamics such as IC to promote sustained cessation among low-income populations.
为低收入人群制定减少戒烟障碍的基于人群的策略是当务之急。利用人际传播（IC）等二次传播有助于减少烟草使用，但缺乏准实验研究来检验 IC 与戒烟行为的全貌，特别是在人群水平的项目背景下。
使用准实验方法，我们考察了对人群水平干预的 IC 反应及其对低收入吸烟者戒烟行为全貌的影响。
我们使用倾向评分匹配；采用三种不同的倾向评分匹配程序来估计和近似实验效果。我们评估了四种戒烟结果：利用免费戒烟热线（QL）、尝试戒烟以及在随访中 7 天和 30 天不吸烟。我们还检验了 IC 的预测因素。
IC 与 QL 的利用显著相关（效应大小范围为 0.135 至 0.166）、尝试戒烟（效应大小范围为 0.115 至 0.147）、7 天不吸烟（效应大小范围为 0.080 至 0.121）和 30 天随访时不吸烟（效应大小范围为 0.058 至 0.082）。与项目相关的特征和参与者特征预测了 IC，例如接受情感直接邮件材料和与吸烟者同住。
对基于人群的计划的 IC 反应影响了戒烟过程，并且 IC 对持续戒烟有显著影响。
基于人群的计划应旨在利用 IC 等社会心理动态来促进低收入人群的持续戒烟。
