Table 2.

Quality assessment and risk of bias of included studies

STUDY ID	SELECTION BIAS	STUDY DESIGN	CONFOUNDERS	BLINDING	DATA COLLECTION METHODS	WITHDRAWALS AND DROP-OUTS	OVERALL RATING	Funding	COI
Alvirde-Garcia et al. (2013)	Moderate	Strong	Strong	Moderate	Strong	Weak	MODERATE	Funded by public national hospital and Metabolic Syndrome Institute	NR
Arroyo and Carrete (2018)	Moderate	Moderate	Weak	Moderate	Moderate	Weak	WEAK	No funding obtained	NR
Bacardi-Gascon and Jiménez-Cruz (2012)	Moderate	Strong	Weak	Moderate	Moderate	Strong	MODERATE	Funded by a public university	NR
Balas-Nakash et al. (2010)	Weak	Moderate	Strong	Moderate	Strong	Moderate	MODERATE	NR	Nothing to declare
Benitez-Guerrero et al. (2016)	Moderate	Strong	Weak	Moderate	Strong	Weak	WEAK	Funded by a public university	NR
Caballero-Garcia et al. (2017)	Moderate	Moderate	Strong	Moderate	Moderate	Weak	MODERATE	NR	NR
Costa-Urrutia et al. (2019)	Moderate	Moderate	Strong	Moderate	Strong	Weak	MODERATE	Funded by a local authority	Nothing to declare
Cruz-Bello et al. (2019)	Weak	Moderate	Weak	Moderate	Moderate	Weak	WEAK	NR	NR
Elizondo-Montemayor et al. (2014)	Weak	Moderate	Weak	Moderate	Moderate	Weak	WEAK	Funded by a private university	NR
Gatica-Dominguez et al. (2019)	Moderate	Strong	Weak	Moderate	Strong	Weak	WEAK	Funded by food industry (Tresmontes lucchetti Mexico)	NR
Macias et al. (2014) (Abstract)	Weak	Strong	Weak	Moderate	Moderate	Weak	WEAK	NR	NR
Martinez-Andrade et al. (2014)	Strong	Strong	Strong	Strong	Moderate	Moderate	STRONG	Funded by a public hospital	Nothing to declare
Mejia et al. (2016) (Abstract)	Weak	Strong	Weak	Moderate	Moderate	Weak	WEAK	Local health authorities	NR
Padilla-Raygoza et al. (2013)	Moderate	Strong	Moderate	Moderate	Moderate	Weak	MODERATE	National Ministry of Education	Nothing to declare
Perichart-Perera et al. (2008)	Moderate	Moderate	Strong	Moderate	Strong	Weak	MODERATE	Funded by food industry (PepsiCo)	NR
Polo-Oteyza et al. (2017)	Moderate	Moderate	Strong	Moderate	Strong	Weak	MODERATE	Funded by food industry (Nestle) and National public University	NR
Ponce et al. (2016)	Moderate	Strong	Weak	Moderate	Strong	Weak	WEAK	NR	NR
Radilla-Vazquez et al. (2019)	Moderate	Strong	Strong	Moderate	Strong	Moderate	STRONG	NR	NR
Ramirez-Lopez et al. (2005)	Moderate	Strong	Weak	Moderate	Strong	Weak	WEAK	Local authorities funding	NR
Rios-Cortazar et al. (2013)	Weak	Moderate	Weak	Moderate	Strong	Weak	WEAK	NR	Nothing to declare
Vazquez et al. (2017)	Moderate	Moderate	Weak	Moderate	Moderate	Weak	WEAK	NR	NR
Rodriguez-Ventura et al. (2018)	Moderate	Moderate	Weak	Moderate	Moderate	Moderate	MODERATE	Science Mexican Council	Nothing to declare
Safdie et al. (2013a, b)	Strong	Strong	Moderate	Moderate	Strong	Strong	STRONG	Supported by the Pan American Health Organization, Program of The International Life Science Institute, Science Mexican Council, Health Ministry, and global health Research Initiative	Nothing to declare
Salazar-Vazquez et al. (2016)	Moderate	Strong	Strong	Moderate	Strong	Weak	MODERATE	National Funds	Nothing to declare
Saucedo-Molina et al. (2018)	Moderate	Moderate	Weak	Moderate	Strong	Weak	WEAK	Funded by two private foundations	NR
Levy et al. (2012a, b)	Strong	Strong	Strong	Strong	Strong	Strong	STRONG	Local authorities	Nothing to declare
Vega et al. (2019)	Moderate	Strong	Strong	Moderate	Strong	Weak	MODERATE	NR	NR
Vilchis-Gil et al. (2016)	Moderate	Strong	Strong	Moderate	Strong	Strong	STRONG	Public Paediatric Hospital	Nothing to declare
Zacarias et al. (2019)	Moderate	Moderate	Weak	Moderate	Strong	Strong	MODERATE	Science Mexican Council and public university	Nothing to declare

^{NR not reported, COI conflict of interest}