Table 1.

Studies included in the systematic review.

	Authors and publication year	Country	Age (years)	Type	Number of participants	Acceptability	Method used
1)	Szarewski et al. (9)	United Kingdom	21 – 65	Transversal	28	Low	Questionnaire
2)	Mitchell et al. (10)	Uganda	30 – 65	Transversal	300	High	Subjective
3)	Szarewski et al. (11)	United Kingdom	29 – 65	Randomized	3000	High	Questionnaire
4)	Ortiz et al. (12)	USA	18 – 34	Case-control	100	High	Questionnaire
5)	Cerigo et al. (13)	Canada	18 – 69	Case-control	93	High	Subjective
6)	Quincy et al. (14)	Nicaragua	25 – 60	Case-control	250	High	Subjective
7)	Fielder et al. (15)	USA	18 – 69	Randomized	483	High	Subjective
8)	Penaranda et al. (16)	Mexico	30 – 65	Transversal	21	High	Subjective
9)	Sultana et al. (17)	Australia	30 – 69	Randomized	8000	High	Questionnaire
10)	Vanderpool et al. (18)	USA	30 – 64	Transversal	31	High	Subjective
11)	Racey et al. (19)	Canada	30 – 70	Randomized	818	High	Questionnaire
12)	Penaranda et al. (20)	Mexico	30 – 65	Transversal	110	High	Subjective
13)	Sultana et al. (21)	Australia	30 – 69	Transversal	35	High	Subjective
14)	Crofts et al. (22)	Cameroon	30 – 65	Transversal	450	High	Questionnaire
15)	Fargnoli et al. (23)	Switzerland	24 – 67	Transversal	125	Low	Subjective
16)	Sultana et al. (24)	Australia	30 – 69	Transversal	1521	High	Questionnaire
17)	Dareng et al. (25)	Nigeria	18 – 69	Transversal	600	High	Questionnaire
18)	Boggan et al. (26)	Haiti	25 – 65	Case-control	1845	High	Subjective
19)	Wong et al. (27)	China	35 – 65	Randomized	392	High	Questionnaire