Trial name	Allocation sequence generation	Allocation concealment	Blinding of outcome assessor	Inclusionb
Ansah 2003	Inadequate	Unclear	Absent	Adequate
Lauwo 2006	Unclear	Unclear	Absent	Inadequate
Li 1998a	Inadequate	Unclear	Absent	Unclear
Li 1998b	Inadequate	Unclear	Absent	Unclear
Yeboah‐Antwi 2001c	Adequate	Unclear	Absent	Unclear