Changes of Local Blood Flow in Response to Acupuncture Stimulation: A Systematic Review

Table 4

Methodological quality of the included studies.

Author (year)	Selection		Performance	Detection	Attrition	Reporting
	1	2	3	4	5	6
Min et al. (2015) [13]	Y	?	?	Y	Y	Y
Huang et al. (2012) [14]	Y	?	Y	Y	Y	N
Zhang et al. (2008) [15]	?	?	?	Y	Y	Y
Tsuchiya et al. (2007) [16]	?	?	Y	Y	Y	Y
Sandberg et al. (2005) [17]	?	?	?/N	Y	Y	Y
Sandberg et al. (2004) [18]	?	?	?/N	Y	Y	Y
Sandberg et al. (2003) [19]	?/N	?	?/N^a	Y	Y	Y
Litscher et al. (2002) [20]	?	?	?	Y	Y	Y

Items for RCT: 1, adequate sequence generation; 2, adequate allocation concealment; 3, blinding of participants and research personnel; 4, blinding of outcome assessments; 5, adequate consideration of incomplete outcome data; 6, free of suggestion of selective outcome reporting [21].
N, no (high risk of bias); ?, unclear (lack of information); Y, yes (low risk of bias).
Other control groups/no-acupuncture group.