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Fig. 2 | BMC Public Health

Fig. 2

From: Exploring the association between school-based peer networks and smoking according to socioeconomic status and tobacco control context: a systematic review

Fig. 2

Summary of study findings relating to socioeconomic status according to year of publication and country. Vertical white lines represent the introduction of a comprehensive smoking ban in each country. Numbers, − 1, 0 or 1, to the left of each set of results refer to the study quality ratings of low, medium and high, respectively. Superscript numbers reference the study that each set of results refer to

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