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Table 2 For each domain risk of bias is rated as high, unclear or low

From: Does a low FODMAPs diet reduce symptoms of functional abdominal pain disorders? A systematic review in adult and paediatric population, on behalf of Italian Society of Pediatrics

Reference Random sequence generation (Selection bias) Allocation concealment (Selection bias) Blinding of participant and personnel (Performance bias) Blinding of outcome assessment (Detection bias) Incomplete outcome data (Attrition bias) Selective reporting (Reporting bias) Choice of control groups (Bias in design)
Bohn 2015 [20] Low risk Unclear risk Low risk Low risk Low risk Low risk Low risk
Chumpitazi 2015 [22] Low risk Low risk Low risk Low risk Low risk Low risk High risk
de Roest 2013 [33] No randomised High risk High risk High risk High risk High risk High risk
Escobar 2014 [45] High risk High risk High risk High risk High risk High risk Low risk
Gijsbers 2012 [42] High risk High risk High risk High risk High risk High risk High risk
Gomara 2008 [43] High risk High risk High risk High risk High risk High risk High risk
Gremse 2003 [41] Unclear risk Unclear risk High risk High risk High risk High risk Low risk
Halmos 2014 [28] Low risk Unclear risk Low risk Unclear Low risk Low risk High risk
Houstoft 2016 [31] Low risk Low risk Low risk High risk Unclear Low risk High risk
Lebenthal 1981 [40] High risk High risk High risk High risk High risk High risk High risk
Maagard 2016 [36] High risk Unclear risk High risk Unclear High risk Low risk High risk
Ong 2010 [30] Low risk Unclear risk Low risk Unclear Low risk Low risk Low risk
Pedersen 2014 [29] Low risk Low risk High risk High risk High risk High risk High risk
Pedersen 2014 [32] High risk High risk High risk High risk High risk Low risk High risk
Staudacher 2011 [21] Unclear High risk High risk High risk Unclear High risk High risk
Staudacher 2012 [27] Low risk Low risk Low risk High risk High risk High risk Low risk
Valeur 2016 [35] High risk High risk High risk High risk High risk Low risk High risk
Wildersmith 2017 [34] High risk High risk High risk High risk low risk Low risk High risk
Wintermeyer 2012 [44] High risk High risk High risk High risk High risk High risk High risk