Table 1.

Characteristics of studies and participants (n = number of individual studies)

Data Collection
Region	n	Year of data collection	n
USA	18	2015–2020	1
Canada	3	2010–2015	13
Europe	7	2005–2010	12
Asia	4	< 2005	4
Australia	3	Long-term/cohort-follow-up	2
South America	1	NA	3
Setting		Sample size
Urban	21	≤ 100	2
Peri-urban (combination of urban and suburban)	2	101–300	7
Suburban	3	301–500	5
Rural	0	501–1000	10
NA	6	1001–2500	5
Study design		> 2500	5
Cross-sectional study	29	NA	1
Longitudinal/observational study	4
Cluster-randomized intervention trial	2

NA not applicable or not reported