Tapete 2018.

Study characteristics
Methods	RCT Setting: NS, Italy Study period: 2017 The study presents results for the IBD cohort as a whole, does not separate between CD and UC. Where separate data do exist they are presented below.
Participants	Inclusion criteria: clinical remission (CDAI < 150 for CD and full Mayo < 3 for UC) with normal values of ESR, CRP, white blood cells and neutrophil count, but with residual intestinal symptoms (abdominal pain, bloating, and abnormal stool consistency ‐ Bristol stool classification > 5) Exclusion criteria: NS Age (mean ± SD): NS Sex (M/F): NS Site of disease: NS Use of concurrent medication: NS Disease activity: inactive Disease duration: NS Number randomised: IG: 10; CG: 20 Number reaching end of study: NS Number analysed: NS Postrandomisation exclusion: NS
Interventions	IG: low FODMAP diet CG: sham control diet
Outcomes	Length of intervention: 6 to 8 weeks Primary outcomes: Abdominal pain intensity measured on a 0‐to‐10‐centimetre VAS. Secondary outcomes: None reported
Notes	Funding source: NS Conflict of interest: NS Author contact details: g.tapete@studenti.unipi.it
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	NS. We contacted the author but received no response.
Allocation concealment (selection bias)	Unclear risk	NS. We contacted the author but received no response.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not possible for this type of intervention
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	NS. We contacted the author but received no response.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	More information is needed. We contacted the author but received no response.
Selective reporting (reporting bias)	Low risk	The outcomes mentioned in the methods are reported in the results.
Other bias	Low risk	No apparent sources of bias; conflicts of interest are not clear, but not downgraded