Table 2.

Eligibility criteria

Inclusion criteria		Exclusion criteria
Population	Inmates	Concentration camps/non-penal institutions
	Women	Men
	Any age	Asylum seekers in detention
	General prison population	Previous inmates
	Imprisoned at some point during pregnancy, up to and including delivery	Never pregnant during imprisonment
		Psychiatric units
Intervention	Model of perinatal health care describedb	No description of perinatal health care
Control group	No comparison group needed
Outcomes	Pre-specified perinatal outcomes quantifieda	No pre-specified perinatal outcomes quantified
	Early childhood outcomes quantified (up to age 5)	No early childhood outcomes quantified (up to age 5)
	Any other measures of maternal morbidity quantified	No measures of maternal morbidity quantified
	Outcomes relating to health care utilisation quantified	No such outcomes measured
Studies	All languages
	Data collected after 1980	Data collected before 1980
	Any study design

^aPre-specified perinatal outcomes were: miscarriage, fetal anomaly, preterm delivery, small for gestational age, low birthweight, mean birthweight, stillbirth, perinatal death, neonatal death, infant death, admission to neonatal intensive care, breastfeeding, caesarean section rates, and instrumental delivery rates

^bThis included any description of perinatal health care, however minimal