Table 1:

Study characteristics of the included studies

No	First Author, (yr)	Country	Study design	Sample Size	Mean Age (yr old)	Gender
1	Tian et al (2015) (23 )	China and India	Experimental study, cluster-randomized controlled trial	47 villages (27 in China and 20 in India), 2086 individuals, 1095 intervention and 991 control	Intervention=59.7, control=60.4, total=60.0	Female: intervention=65.4%, control=66.8%
2	O’Neil et al (2016) (24 )	Uganda	Retrospective, quasi-experimental study design	209 individuals, 93 intervention and 116 control	Intervention=64.1, control=60.1, total=61.9	Female: intervention=84.1%, control=74.3%
3	Margolius et al (2012) (25 )	United States	Experimental study	204 individuals, 110 intervention and 94 control	Intervention=60.7, control=60.1, total=60.4	Female: intervention=62.7%, control=63.8%
4	West et al (2011) (26 )	United States	Experimental study	228 individuals, 116 intervention and 112 control	Intervention=70.6, control=71.9, total=71.2	Female: intervention=91.0%, control=77.0%