Table 5

Summary of the theoretical domains of the included studies

The study ID (first author, year, country)	The effectiveness of the intervention in smoking prevention		Knowledge		Skills			Memory, attention and decision process	Behavioural regulation	Environmental context and resources	Social influences	Beliefs about consequences	Beliefs on capabilities	Optimism	Intentions	Identity /social role	Personal-goals	Reinforcement S	Emotion management
The study ID (first author, year, country)	The effectiveness of the intervention in smoking prevention		Knowledge on consequences	Normative education	Social competence	Social influence	Combined	Memory, attention and decision process	Behavioural regulation	Environmental context and resources	Social influences	Beliefs about consequences	Beliefs on capabilities	Optimism	Intentions	Identity /social role	Personal-goals	Reinforcement S	Emotion management
Perry et al39 2009, India	Effective		X			X		X		X	X	X	X		X	X		X
Motamedi et al44 2016 South Africa	Effective		X				X	X	X			X		X	X	X	X		X
Lotrean et al45 2013, Romania	Effective		X			X		X			X	X	X		X	X		X
Reddy et al40 2002, India	School intervention	Effective	X			X				X	X	X			X
Reddy et al40 2002, India	School intervention plus family intervention	Effective	X			X				X	X	X			X
Tahlil et al41 2015, Indonesia	Islamic-based intervention	Ineffective	X	X	X							X			X
	Health-based intervention	Ineffective	X	X			X				X	X			X				X
	Combined health and Islamic-based intervention	Ineffective	X	X			X					X			X				X
Resnicow et al47 2010, South Africa	Harm management	Ineffective	X		X			X				X			X
Resnicow et al47 2010, South Africa	Life skills intervention	Ineffective	X				X	X				X			X				X
Chou et al48 2006, China	Ineffective		X	X		X		X			X	X			X	X
Seal38 2006, Thailand	Ineffective		X				X	X		X		X			X				X
Wen et al42 2010, China	Ineffective		X				X	X		X	X	X			X	X		X	X
Marsiglia et al43 2015, Mexico	Ineffective		X			X		X				X	X		X
Chen et al49 2014, China	Ineffective		X			X				X	X	X			X	X