Table 2

Study inclusion and exclusion criteria

PICOTC	Definition	Inclusion criteria	Exclusion criteria
Population	Postpartum women	All women aged 18 and older, women who gave birth and women up to 1 year after giving birth	Women who have experienced substance abuse and intimate partner violence Women who experienced common mental illness during pregnancy (before giving birth)
Exposure /intervention	Adverse perinatal outcome	Postpartum women who experienced at least one of the adverse perinatal outcomes (preterm, SGA, LBW, congenital anomalies, stillbirth and neonatal death)	Another _
Comparison	With and without adverse perinatal outcome	Articles reported the maternal mental illness among postpartum women experienced adverse perinatal outcome Articles reported maternal mental illness among postpartum women who did not experience adverse perinatal outcomes	_
Outcome	Maternal mental illness incurred due to the presence of adverse perinatal outcomes during postpartum period	Articles quantitatively reported the mental illness among postpartum women experienced adverse perinatal outcomes	Qualitatively assessed maternal mental illness
Type of studies	Types of articles/evidence to be included in the review	All primary observational studies reported on association between adverse perinatal outcomes and postpartum maternal mental illness	Qualitative studies Editorials and conference papers Review papers RCT studies
Context/ settings	Low-income and middle-income countries	All low-income and middle-income countries according to the world bank definition of 2023	Country not low-income and middle- income in 2023, but low income andmiddle income prior to the review
Other criteria	Year	Article published after 1 January 2000	Article published before 2000
	Language	Published in English	Studies published in non-English language
	Studies species	Human studies	Animal studies

LBW, low birth weight; PICOTC, Patient/population-Intervention-Comparison-Outcomes-Type of study-Context; RCT, randomised controlled trial; SGA, small for gestational age.