Table 2.

Geographical and language distribution of studies

	Number	%
Region (n = 1,179)
Africa	524	44.4
Northern Africa	28	2.4
Eastern Africa	182	15.4
Western Africa	193	16.4
Middle Africa	84	7.1
Southern Africa	5	0.4
Multi-Africa region	32	2.7
Asia	523	44.4
South Asia	143	12.1
Southeast Asia	324	27.5
East Asia	40	3.4
Western Asia	7	0.6
Multi-Asia region	9	0.8
South and Central America	97	8.2
South America	88	7.5
Central America and Caribbean	8	0.7
Multi-America region	1	0.1
Oceania (Melanesia)	22	1.9
Multi-region	13	1.1
Language (n = 1,185)
English	1,072	90.5
French	57	4.8
Chinese	27	2.3
Portuguese	11	0.9
Spanish	10	0.8
Other	8	0.7

Percentages are derived using the number of studies with available data for that variable as the denominator, denoted by n.