Text Messaging-Based Interventions for Smoking Cessation: A Systematic Review and Meta-Analysis

Lori A J Scott-Sheldon, Ryan Lantini, Ernestine G Jennings, Herpreet Thind, Rochelle K Rosen, Elena Salmoirago-Blotcher, Beth C Bock, Lori A J Scott-Sheldon, Ryan Lantini, Ernestine G Jennings, Herpreet Thind, Rochelle K Rosen, Elena Salmoirago-Blotcher, Beth C Bock

Abstract

Background: Tobacco use is one of the leading preventable global health problems producing nearly 6 million smoking-related deaths per year. Interventions delivered via text messaging (short message service, SMS) may increase access to educational and support services that promote smoking cessation across diverse populations.

Objective: The purpose of this meta-analysis is to (1) evaluate the efficacy of text messaging interventions on smoking outcomes, (2) determine the robustness of the evidence, and (3) identify moderators of intervention efficacy.

Methods: Electronic bibliographic databases were searched for records with relevant key terms. Studies were included if they used a randomized controlled trial (RCT) to examine a text messaging intervention focusing on smoking cessation. Raters coded sample and design characteristics, and intervention content. Summary effect sizes, using random-effects models, were calculated and potential moderators were examined.

Results: The meta-analysis included 20 manuscripts with 22 interventions (N=15,593; 8128 (54%) women; mean age=29) from 10 countries. Smokers who received a text messaging intervention were more likely to abstain from smoking relative to controls across a number of measures of smoking abstinence including 7-day point prevalence (odds ratio (OR)=1.38, 95% confidence interval (CI)=1.22, 1.55, k=16) and continuous abstinence (OR=1.63, 95% CI=1.19, 2.24, k=7). Text messaging interventions were also more successful in reducing cigarette consumption relative to controls (d+=0.14, 95% CI=0.05, 0.23, k=9). The effect size estimates were biased when participants who were lost to follow-up were excluded from the analyses. Cumulative meta-analysis using the 18 studies (k=19) measuring abstinence revealed that the benefits of using text message interventions were established only after only five RCTs (k=5) involving 8383 smokers (OR=1.39, 95% CI=1.15, 1.67, P<.001). The inclusion of the subsequent 13 RCTs (k=14) with 6870 smokers did not change the established efficacy of text message interventions for smoking abstinence (OR=1.37, 95% CI=1.25, 1.51, P<.001). Smoking abstinence rates were stronger when text messaging interventions (1) were conducted in Asia, North America, or Europe, (2) sampled fewer women, and (3) recruited participants via the Internet.

Conclusions: The evidence for the efficacy of text messaging interventions to reduce smoking behavior is well-established. Using text messaging to support quitting behavior, and ultimately long-term smoking abstinence, should be a public health priority.

Keywords: cigarette smoking; intervention; meta-analysis; smoking cessation; text messaging.

Conflict of interest statement

Conflicts of Interest: None declared.

Figures

Figure 1
Figure 1
Study retrieval and selection.
Figure 2
Figure 2
Forest plot of the overall odds ratio and the corresponding 95% confidence intervals for smoking abstinence. The size of the square representing the odds ratio for each study is proportional to its weight in the analysis.
Figure 3
Figure 3
Cumulative plot of the overall weighted mean effect sizes and the corresponding 95% confidence intervals for smoking abstinence, based on final date of data collection.
Figure 4
Figure 4
Cumulative plot of the overall weighted mean effect sizes and the corresponding 95% confidence intervals for smoking abstinence, based on final date of data collection and restricted to studies with moderate to high methodological quality ratings.

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Source: PubMed

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