Table 3.

Quality assessment of included interventions^a

Reference	Selection bias	Study design	Confounders	Blinding	Data collection methods	Withdrawals and drop-outs	Overall rating	Funding	COI
Ceballos-Gurrola 202020	Moderate	Strong	Weak	Moderate	Strong	Moderate	Moderate	NR	NR
Diáz 201021	Weak	Strong	Strong	Strong	Strong	Weak	Weak	Funded by an international agency	Nothing to declare
Elizondo-Montemayor 201322	Moderate	Moderate	Weak	Moderate	Strong	Weak	Weak	No funding received	Nothing to declare
Elizondo-Montemayor 201423	Weak	Moderate	Weak	Moderate	Strong	Strong	Weak	Funded by a private university	Nothing to declare
Escalante-Izeta 2013 (abstract)24	Weak	Moderate	Weak	Moderate	Weak	Weak	Weak	NR	NR
García-Morales 200625	Moderate	Strong	Strong	Strong	Strong	Moderate	Strong	Abbott Laboratories	NR
Garibay-Nieto 201726	Weak	Strong	Strong	Moderate	Strong	Weak	Weak	Science Mexican Council	NR
González-Heredia 201427	Moderate	Strong	Weak	Moderate	Strong	Weak	Weak	NR	Nothing to declare
Hall-López 201728	Moderate	Moderate	Weak	Moderate	Strong	Weak	Weak	Funded by a public university	Nothing to declare
Huang 201029–31	Moderate	Strong	Strong	Moderate	Strong	Strong	Strong	Funded by a public pediatric hospital	Nothing to declare
Jimenez 2017 (abstract)32	Weak	Moderate	Weak	Moderate	Weak	Weak	Weak	NR	NR
Laguna-Alcaraz 201733	Moderate	Moderate	Weak	Moderate	Strong	Weak	Weak	No funding received	Nothing to declare
López-Alarcon 201934	Strong	Strong	Strong	Strong	Strong	Strong	Strong	Funded by public health institute and National Council of Education and Science Mexican Council	Nothing to declare
López-Alarcon 202035	Moderate	Strong	Strong	Weak	Strong	Strong	Moderate	Funded by public health institute	Nothing to declare
Luna-Ruiz 200736	Moderate	Moderate	Weak	Moderate	Strong	Strong	Moderate	NR	NR
Martin-Mosqueda 201237	Weak	Moderate	Weak	Moderate	Strong	Weak	Weak	NR	NR
Moran 201738	Moderate	Moderate	Weak	Moderate	Strong	Strong	Moderate	NR	NR
Pompa-Guajardo 201839	Weak	Moderate	Weak	Moderate	Strong	Moderate	Weak	NR	NR
Rodríguez-Morán 201440	Moderate	Strong	Strong	Moderate	Strong	Moderate	Strong	Partially funded by public health institute	Nothing to declare
Romero-Pérez 202041	Moderate	Strong	Weak	Moderate	Strong	Weak	Weak	No funding received	Nothing to declare
Rosado 200842	Strong	Strong	Strong	Moderate	Strong	Moderate	Strong	Funded by industry (Kellogg’s)	Nothing to declare
Rosas-Nexticapa 201743	Weak	Strong	Weak	Moderate	Strong	Weak	Weak	Funded by the National Council of Education and Science Mexican Council	NR
Sáenz-Soto 200444	Weak	Moderate	Strong	Moderate	Strong	Moderate	Moderate	NR	NR
Santiago-Lagunes 2018 (Abstract)45	Weak	Moderate	Weak	Moderate	Strong	Weak	Weak	NR	NR
de Sanchez 200446	Weak	Moderate	Weak	Moderate	Strong	Strong	Weak	NR	NR
Velázquez-López 200947	Moderate	Moderate	Weak	Moderate	Strong	Weak	Weak	Unclear if funded by public health institute	Nothing to declare
Velázquez-López 201448	Moderate	Strong	Strong	Strong	Strong	Strong	Strong	Funded by public health institute	Nothing to declare
Violante-Ortíz 200549	Weak	Moderate	Strong	Moderate	Strong	Weak	Weak	NR	NR
Virgen-Ortíz 2007 (letter to the editor)50	Weak	Moderate	Weak	Moderate	Strong	Weak	Weak	NR	NR

Abbreviations: COI, conflict of interest; NR, not reported.

^aQuality assessed using the Effective Public Health Practice Project Quality Assessment Tool¹² for quantitative studies.