Potential for non-combustible nicotine products to reduce socioeconomic inequalities in smoking: a systematic review and synthesis of best available evidence

Table 1 Distribution of all 54 included studies, by NCNP type, country and age grouping. Three studies reported more than one NCNP, and so are counted twice in this table, hence the overall total of 57. Blank cells indicate no studies

	E-cigarettes		Smokeless tobacco		NRT		Total
	Best Evidence	Other	Best Evidence	Other	Best Evidence	Other	Total
US	5	8 + 1(YP)	13	7 + 3(YP)		1	38
Australia					1		1
Canada		1(YP)				1	2
Ireland		1(YP)					1
Italy		1					1
Finland		1(YP)					1
France		1(YP)					1
Norway			1 + 2(YP)	2(YP)			5
Sweden			2				2
Switzerland		1		1(YP)			2
UK	2				1		3
Total Adults	7	10	16	7	2	2	44
Total Young People	0	5	2	6	0	0	13
Total	7	15	18	13	2	2	57

ISSN: 1471-2458