Intravenous Magnesium Sulphate for Analgesia after Caesarean Section: A Systematic Review

Table 1

Assessment of risk of bias in selected studies based on Cochrane methodology and representation [12].

	Agrawal et al. (2015)	Davoudi et al. (2013)	Elebaly et al. (2011)	Elrahman and Youssry (2017)	Helmy et al. (2015)	Maulik et al. (2015)	Mireskandari et al. (2015)	Paech et al. (2006)	Rezae et al. (2014)	Safavi et al. (2017)
Selection bias
Random sequence generation	?	?	+	+	+	+	+	+	?	?
Allocation concealment	?	?	+	+	+	+	?	+	+	?
Performance bias
Blinding of participants and personnel	?	?	+	+	?	+	+	+	+	?
Detection bias
Blinding of outcome assessment	?	?	+	+	?	+	+	+	?	?
Attrition bias
Incomplete outcome data	?	?	+	+	?	+	+	+	?	?
GRADE quality rating [12]	M	M	H	H	H	H	H	H	H	M

+ = low risk of bias, ? = unclear risk of bias, – = high risk of bias, M = moderate, H = high.