Fig. 1
From: Diet and gut microbiome interactions of relevance for symptoms in irritable bowel syndrome
Quantity and quality assessment for dietary profiles and analyses of associations with gastrointestinal symptom severity. a Food item-based hierarchical tree based on the National Swedish food database and nutrient-based clustering. b Principal coordinate analysis of unweighted UniFrac distance between the dietary profiles of individuals. Food levels were projected onto the two first coordinates (PCoA1 and PCoA2) based on Spearman’s correlation analyses (see Supp Table 1 for the terminology of food level 4). Colors indicate the sex of the individual and the shape of the point indicates health status. c PCoA1 as a function of sex (p < 0.05). d PCoA2 as a function of IBS symptom severity (p = 0.06). e Log2 meat/plant ratio as a function of PCoA1 (rho = − 0.62, p < 0.05). The color gradient extends from red (all meat) to green (all plant-based foods). f FSA-NPS diet index as a function of PCoA2 (rho = 0.24, p < 0.05). g Prevalence of food items per meal as a function of FSA-NPS food quality and health status. Class A corresponds to high-quality food, whereas class E corresponds to low-quality food (p < 0.05)