Table 1.

Demographic data

No	Country of study	Study design	Sample size	Number of sites	Study length in a year	Mean age	Percentage of male	References
1	Korea	CSS	1096	19	7	46	93	[4]
2	UK	Cohort	226	1	1	47	54	[43]
3	Brazil	CSS	87	1	1	37	76	[44]
4	USA	Cohort	567	1	4	43	47	[45]
5	Brazil	CSS	319	7	2	41	61	[46]
6	USA	RCT	2247	3	6	46	79	[47]
7	Brazil	CSS	819	1	1	41	55	[48]
8	Australia	CSS	788	32	3	45	18	[49]
9	Burkina Faso	CSS	400	1	1	41	38	[50]
10	Thailand	CSS	580	1	1	38	46	[51]
11	Brazil	Cohort	539	1	10	40	45	[52]
12	Latin America*	Cohort	4010	61	1	42	74	[53]
13	Brazil	CSS	273	1	2	48	55	[54]
14	USA	CSS	601	1	1	39	52	[55]
15	Brazil	CSS	1240	1	2	37	32	[56]
16	Australia	RCT	210	1	2	39	48	[57]
Average			875	8.3	2.8	41.9	54.6

Latin America* Countries (Argentina, Brazil, Venezuela, Colombia, Peru, Ecuador, and Chile); CSS = Cross-sectional study; RCT = Randomized Clinical Trial