Efficacy of Auricular Acupressure for Chronic Low Back Pain: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Table 1

Methodological quality of all included studies.

Studies	Random allocation	Allocation concealment	Blinding	Incomplete outcome	Selective reporting	Other bias	Quality level
Lu et al. 2015	+	?				+	B
Suen et al. 2007	?	?	+	+	+	+	A
Wang 2015	+				+	+	B
Xia et al. 2011	?				+	+	B
Yeh et al. 2013	+	+	+	+		+	A
Yeh et al. 2014	+	+	+	+	+	+	A
Yeh et al. 2015	+	+	+	+	+	+	A

“+” = criteria “met”; “−” = criteria “unmet”; “?” = criteria “unclear.”