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

Table 5

Patient-ranked pain scores (VAS): magnesium intervention versus control.

Time point of VAS score assessment	Elgebaly 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)^‡
Time of first analgesia req.	Mg = 34	—	—	—	—	—	—
	C = 36
	NS
1 hour	—	—	—	—	Mg = 48.9	—	—
					C = 74.7
					()
2 hours	—	Mg = 51.3	Mg = 3	Mg = 1.2	—	—	Mg = 3.2
		C = 58.7	C = 4	C = 1.7			C = 4.9
		NS	NS	()			()
4 hours	—	—	—	Mg = 1.3	—	—	—
				C = 1.9
				()
6 hours	—	Mg = 40.4	Mg = 4	—	Mg = 42.1	—	—
		C = 53.6	C = 4		C = 58.3
		()	NS		()
8 hours	—	—	—	Mg = 2.7	—	—	—
				C = 3.5
				()
12 hours	—	Mg = 26.1	Mg = 3	—	Mg = 25.2	—	Mg = 2.8
		C = 35.5	C = 3.5		C = 30		C = 3.6
		()	NS		()		()
16 hours	—	—	—	Mg = 1.4	—	—	—
				C = 2
				()
24 hours	—	Mg = 23.3	Mg = 2	Mg = 0.7	Mg = 22.6	—	Mg = 1.8
		C = 24.2	C = 2.5	C = 1.3	C = 23.6		C = 2.9
		NS	NS	()	NS ()		()
48 hours	—	—	—	—	—	Mg^1 = 90	—
						Mg^2 = 83
						C = 90
						NS ()

VAS = visual analogue scale, NS = not significant, visual analogue scale (0–100) expressed as mean, ^†visual analogue scale (0–10) expressed as median, ^‡visual analogue scale (0–10) expressed as mean, ^§patient satisfaction visual analogue scale (0–100) expressed as median, Mg¹ = low-dose group, Mg² = high-dose group, Mg = magnesium intervention group, C = control group.