Trial	Allocation sequence	Allocation concealment	Blinding	Inclusion of randomized participants in analysis
Akbar 1991	Adequate	Adequate	Participants, providers, outcome assessors	Inadequate
Alam 1987	Adequate	Unclear	None	Adequate
Alam 1992	Adequate	Unclear	None	Adequate
Bernal 2005	Adequate	Adequate	Unclear	Adequate
Bhan 1987	Unclear	Unclear	None	Adequate
Bhattacharya 1998	Adequate	Unclear	None	Adequate
Dutta 1988	Adequate	Unclear	Unclear	Adequate
Dutta 1998	Adequate	Unclear	None	Adequate
Dutta 2000	Adequate	Unclear	None	Adequate
el‐Mougi 1988	Adequate	Unclear	None	Adequate
el‐Mougi 1996	Adequate	Adequate	Participants, providers, outcome assessors	Adequate
Faruque 1997	Unclear	Unclear	None	Adequate
Fayad 1993	Adequate	Adequate	Unclear	Adequate
Guiraldes 1995a	Adequate	Adequate	None	Adequate
Guiraldes 1995b	Adequate	Adequate	None	Adequate
Hossain 2003	Adequate	Adequate	None	Adequate
Intarakhao 2010	Unclear	Unclear	Unclear	Adequate
Islam 1994	Adequate	Unclear	None	Adequate
Iyngkaran 1998	Unclear	Unclear	None	Adequate
Maulen‐Radovan 1994	Adequate	Adequate	None	Adequate
Maulen‐Radovan 2004	Adequate	Adequate	None	Adequate
Mohan 1988	Unclear	Unclear	None	Adequate
Molla 1985	Adequate	Unclear	None	Adequate
Molla 1989a	Unclear	Unclear	Unclear	Adequate
Molla 1989b	Adequate	Unclear	Participants and providers not blinded; outcome assessors unclear	Adequate
Mustafa 1995	Unclear	Unclear	Unclear	Adequate
Nanulescu 1999	Unclear	Unclear	None	Inadequate
Patra 1982	Unclear	Adequate	None	Adequate
Ramakrishna 2000	Adequate	Unclear	Participants and providers partially blinded; outcome assessors unclear	Adequate
Ramakrishna 2008	Adequate	Adequate	Assessors but not the participants or providers were blinded because of the nature of the study	Adequate
Razafindrakoto 1993	Unclear	Unclear	None	Adequate
Santos Ocampo 1993	Adequate	Adequate	Participants, providers, outcome assessors	Adequate
Sharma 1998	Unclear	Unclear	None	Adequate
Wall 1997	Adequate	Unclear	Participants and providers not blinded; outcome assessors unclear	Adequate
Zaman 2001	Adequate	Unclear	None	Adequate