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Table 2 Risk of bias of included studies

From: Smoking cessation in severe mental ill health: what works? an updated systematic review and meta-analysis

  Adequate sequence generation Allocation concealment Blinding of participants and personnel Blinding of outcome assessment Incomplete outcome data addressed Free of selective reporting Free of other bias Overall
Baker 2006 [18] Unclear High Risk High Risk Low Risk Low Risk Low Risk Low risk High risk
Baker 2015 [32] Unclear Unclear High Risk Low Risk High Risk Low Risk Low risk High
Chen 2013 [29] Unclear Unclear Unclear Unclear Low Risk Unclear Low risk Unclear
Chengappa 2014 [31] Unclear Unclear Low Risk Low Risk Unclear Low risk Low risk Unclear
Dalak 1999 [11] Unclear Unclear Unclear Unclear Unclear High risk High risk Unclear
Evins 2001 [13] Unclear Unclear Unclear Unclear Low Risk Unclear Low risk Unclear
Evins 2005 [17] Unclear Unclear Unclear Unclear Unclear Unclear High risk Unclear
Evins 2007 [19] Unclear Unclear Unclear Unclear Unclear Unclear Low risk Unclear
Fatemi 2013 [30] Unclear Unclear Unclear Unclear Unclear Unclear Unclear Unclear
Gallagher 2007 [20] Unclear Unclear High Risk High Risk High risk Unclear Low risk High
George 2000 [12] Unclear Unclear High Risk Unclear Unclear Unclear High risk High
George 2002 [14] Unclear Unclear Low Risk Low Risk Low risk Unclear Low risk Unclear
George 2008 [21] Unclear Unclear Unclear Unclear High risk High risk Low risk High
Gilbody 2015 [33] Low Risk Low Risk High Risk High Risk Low Risk High Risk Low risk High
Steinberg 2003 [15] Unclear Unclear High Risk Low Risk High Risk Unclear Low risk High
Tidey 2011 [24] High Risk High Risk Low Risk Low Risk High Risk Unclear High risk High
Weinberger 2008 [22] Unclear Unclear Unclear Unclear High Risk Unclear High risk High
Weiner 2011 [25] Unclear Unclear Unclear Unclear Unclear Unclear Unclear Unclear
Weiner 2012 [26] Unclear Unclear Unclear Unclear Low risk Unclear Low risk Unclear
Williams 2010 [23] Unclear Unclear High Risk Low Risk High Risk Unclear High risk High
Williams 2012 [27] Unclear Unclear Low Risk Low Risk Low Risk Low Risk Unclear Unclear
Wing 2012 [28] Unclear Unclear Unclear Unclear Unclear Unclear Unclear Unclear
Wu 2012 [37]   Unclear Unclear Unclear Unclear Unclear Unclear Unclear
Steinberg 2016 [36] Unclear Unclear High risk Low risk Low risk Unclear High risk High
Smith 2015 [34] Low risk Low risk Low risk Low risk Unclear Unclear Low risk Low risk
Smith 2016 [35] Low risk Low risk Low risk Low risk Low risk Low risk Unclear Low risk