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. 2013 Aug 2;71(1):20.
doi: 10.1186/0778-7367-71-20.

Do mass media campaigns improve physical activity? a systematic review and meta-analysis

Ajibola I Abioye  1 , Kaveh Hajifathalian, Goodarz Danaei
Affiliations

Do mass media campaigns improve physical activity? a systematic review and meta-analysis

Ajibola I Abioye et al. Arch Public Health. .

Abstract

Background: Mass media campaigns are frequently used to influence the health behaviors of various populations. There are currently no quantitative meta-analyses of the effect of mass media campaigns on physical activity in adults.

Methods: We searched six electronic databases from their inception to August 2012 and selected prospective studies that evaluated the effect of mass media campaigns on physical activity in adults. We excluded studies that did not have a proper control group or did not report the uncertainties of the effect estimates. Two reviewers independently screened the title/abstracts and full articles. We used random-effects models to pool effect estimates across studies for 3 selected outcomes.

Results: Nine prospective cohorts and before-after studies that followed-up 27,601 people over 8 weeks to 3 years met the inclusion criteria. Based on the pooled results from these studies, mass media campaigns had a significant effect on promoting moderate intensity walking (pooled relative risk (RR) from 3 studies=1.53, 95% Confidence Interval: 1.25 to 1.87), but did not help participants achieve sufficient levels of physical activity [4 studies pooled RR=1.02, 95% CI: 0.91 to 1.14)]. The apparent effect of media campaigns on reducing sedentary behavior (pooled RR=1.15, 95% CI: 1.03 to 1.30) was lost when a relatively low-quality study with large effects was excluded in a sensitivity analysis. In subgroup analyses, campaigns that promoted physical activity as a 'social norm' seemed to be more effective in reducing sedentary behavior.

Conclusion: Mass media campaigns may promote walking but may not reduce sedentary behavior or lead to achieving recommended levels of overall physical activity. Further research is warranted on different campaign types and in low- and middle- income countries.

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Figures

Figure 1
Figure 1
Flow-chart of study selection.
Figure 2
Figure 2
Forest plot showing the effect of mass media campaigns on sedentary lifestyles (A) before and (B) after excluding a study with very low quality score [18].
Figure 3
Figure 3
Forest plot showing the effect of mass media campaigns on sufficient walking.
Figure 4
Figure 4
Forest plot showing the effect of mass media campaigns on sufficient physical activity.
See this image and copyright information in PMC

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