Table 5. Sensitivity analysis of VAS during injection.

		Heterogeneity			Meta-analysis
	No. of studies	I 2 (%)	P	Model	Mean difference	95% CI
Sensitivity analysis
Al-Shayyab et al. 2017 excluded	2	93	0.0001	Random-effect	6.78	−0.93–14.50
Jain & Nazar, 2018 excluded	2	36	0.21	Random-effect	11.32	9.84–12.80
Ryalat et al., 2018 excluded	2	95	<0.00001	Random-effect	7.51	−1.68–16.71