TABLE 1.

Eligibility criteria

	Inclusion	Exclusion
Population	Studies with women of reproductive age (15–49 y) during prepregnancy, pregnancy, or postpartum (≤42 d after delivery)	Studies with women outside 15–49 y. Studies with men, children, or infants without separated outcomes for women
Exposure	Studies that report maternal dietary patterns such as food intake frequencies and diversity	Studies that reported on nutritional status without discussion of food groups or items
Context	Studies conducted in ≥1 low- and middle-income countries (as classified by the World Bank)	Excluded if study does not specify outcomes of interest specifically for low- and middle-income countries
Outcomes	Studies that report associations between maternal dietary patterns and pregnancy hypertension outcomes (chronic hypertension, gestational hypertension, pre-eclampsia, superimposed pre-eclampsia)	Studies that report on infant or child health outcomes only. Studies that do not report on pregnancy hypertension outcomes
Study design	Case-controlled, cohort studies, randomized controlled trials. Studies with primary data collection	Cross-sectional surveys, uncontrolled pre-post studies, and studies without primary data collection and sufficient methodological data, including reviews, commentaries and editorials, letters to the editor, study protocols, conference abstracts and proceedings
Language	Studies published in the English language	Excluded if not written in the English language
Other	No restrictions on the time of publication