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Table 2 Risk of bias of the studies included in the present review

From: Acupuncture for insomnia after stroke: a systematic review and meta-analysis

  Ye 2013 [22] Li 2012 [23] Huang 2012 [24] Wu 2012 [25] Huang 2011 [26] Sun 2011 [27] Ye 2010 [28] Lee 2009 [20] Lu 2008 [29] Li 2007 [8] Liu 2006 [30] Kim 2004 [21] Wang 2004 [31]
1. Was the method of randomization adequate? U U U U U L L U L U L U L
2. Was the treatment allocation concealed? U U U U U L L U L U L U L
3. Was the patient blinded to the intervention? U U U U U U U L U U U L U
4. Were the personnel blinded to the intervention? U U U U U U U U U U U U U
5. Was the outcome assessor blinded to the intervention? U U U U U U U L U U U L U
6. Were incomplete outcome data adequately addressed? L L L L L L L L L L L L L
7. Are reports of the study free of suggestion of selective outcome reporting? L L L L L L L L L L L L L
8. Was the study apparently free of other problems that could put it at a high risk of bias? U U U U U U U U U U U U U
  1. Notes. Based on the risk of bias assessment tool from the Cochrane handbook for systematic reviews of interventions, high risk of bias: H, low risk of bias: L, uncertain risk of bias: U
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