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 |