Table 4.

Risk of suffering from adverse effects after treatment. Pulse radiofrequency vs. continuous radiofrequency.

Measures were taken after treatment
Study	Risk difference	95% Confidence interval		Sample weights Random-effects	Significance
		Lower limit	Upper limit
Erdine et al. (2007)	-0.85	-1.01	-0.69	25.4%	0.2997
Li et al. (2012)	0	0	0	26.2%
Fang et al. (2015)	0	0	0	26.2%
Elawamy et al. (2017)	-0.11	-0.49	0.26	22.2%
Global	-0.3166	-0.4543	-0.1788	18.49
Chi-square test for heterogeneity = 0.17					0.4991