BMC Complementary Medicine and Therapies

Table 2 Risk of bias of included studies

From: Neuroprotective properties of curcumin in toxin-base animal models of Parkinson’s disease: a systematic experiment literatures review

Study	Virginia 2005	Pan 2007	Balusamy 2008	Rajeswar 2008	Wang 2009	Song 2010	Peng 2010	Zahra 2012	Du 2012	Yu 2012	Guo 2012	Tripanichkui 2013	Ariana 2014
A	√	√	√	√	√	√	√	√	√	√	√	√	√
B	√				√			√	√	√	√	√	√
C	√
D
E	√	√	√	√	√	√	√	√	√	√	√	√	√
T	√		√	√		√		√	√			√	√
Total	5	2	3	3	3	3	2	4	4	3	3	4	4

A: peer reviewed publication; B:random allocation to group; C: blinded assessment of outcome; D: a sample size calculation; E: compliance with animal welfare regulations; F: a statement of a potential conflict of interest

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ISSN: 2662-7671

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