Table 3.

Methodological Quality

	Ageno 2001	Anderson 2007	Caraco 2007	Crowther 1999	Gedge 2000	Harrison 1997	Hillman 2005	Kovacs 2003	Quiroz 2006	Roberts 1999	Shine 2003
Randomisation Method	+	+	+	+	NM	+	+	+	+	NM	+
Concealment of allocation	NM	+	-	NM	NM	NM	+	+	NM	-	+
Double blinding	NM	+	-	-	NM	-	-	+	-	-	NM
Intention to treat	-	-	-	-	-	-	+	+	+	-	-

+ Reported in paper

- Paper indicates that did not take place

NM: Not mentioned in paper