Table 2.

Included Studies

	POPULATION	STUDY TYPE	DATES	NUMBER OF CASES	CONTROLS/DENOMINATOR	INCIDENCE (%)	SAMPLING
Adefuye et al. [31]	Post-partum women aged 19–43 years	Retrospective cohort study	1988–2007	23	9085	0.25% or 2.5 in 1000	All patients who developed mental disorders and were managed at Olabisi Onabanjo University Teaching Hospital
Bang et al. [34]	Pregnant and post-partum women aged (exact age range unknown)	Prospective observational study	1995–1996	2	772	0.26% or 2.6 in 1000	Women from catchment area of 39 intervention villages who became pregnant and were observed at home by trained village health workers, validated by physician
Nager et al. [44]	Primiparous women aged (exact age range unknown)	Retrospective cohort study	1975–2003	1413	1133,368	0.12% or 1.2 in 1000	All first-time mothers admitted to hospital due to psychiatric disorders up to 3 months after delivery (based on national registries)
Terp et al. [45]	Postpartum women aged years (exact age range unknown)	Incidence/Prevalence Survey	1973–1993	1133	1,270,117	0.089% or 0.89 in 1000	All women who delivered in Denmark and were admitted to hospital and diagnosed with psychosis up to 3 months after delivery (based on national registries)
Valdimarsdóttir et al. [33]	Primiparous women aged (exact age range unknown)	Incidence/Prevalence Survey	1983–2000	892	745,596	0.12% or 1.2 in 1000	All first-time mothers who were diagnosed with psychosis up to 3 months post-partum (based on national registries)
						PREVALENCE
Vesga-Lopez et al. [32]	Postpartum women aged 18–50 years	Incidence/Prevalence Survey	2001–2002	(Exact number not reported - % only)	994	0.5% or 5 in 1000	Nationally representative sample of women interviewed during the 2001–2002 National Epidemiologic Survey on Alcohol and Related Conditions.