Effect of dietary fibre on the gastrointestinal microbiota during critical illness: A scoping review

Table 2 Randomised controlled trials that failed to change the gastrointestinal microbiota

Ref.	Intervention/placebo	Method of analysis
Ampatzoglou et al[34], 2015	high (> 80 g/day) or low (< 16 g/day) whole grain (n = 33)	FISH analysis
An et al[35], 2019	15 g/day sugar beet pectin or maltodextrin	16S rRNA amplicon sequencing
Brandl et al[36], 2020	Commercial fibre product enriched with 10 g wheat or without enrichment (n = 48)	16S rRNA amplicon
Vuholm et al[37], 2017	Whole grain or refined wheat group (n = 70)	16S rRNA amplicon sequencing

FISH: Fluorescent in situ hybridization.