Chinese Herbal Medicine for the Treatment of Prehypertension

Table 3

Quality assessment of included randomized controlled trials.

Included trials	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other sources of bias	Risk of bias
Yang 2011 [45]	Table of random number	Unclear	Unclear	Unclear	Yes	No	Unclear	Unclear
Li 2010 [46]	Table of random number	Unclear	Unclear	Unclear	Yes	No	Unclear	Unclear
Li et al. 2011 [47]	Unclear	Unclear	Unclear	Unclear	Yes	No	Unclear	High
Wu and Ding 2011 [48]	Unclear	Unclear	Unclear	Unclear	Yes	No	Unclear	High
Zhang 2012 [49]	Unclear	Unclear	Unclear	Unclear	Yes	No	Unclear	High