Table 3 Faecal organic acid concentrations.

Parameters	Concentration [μmol/g-faeces]		H vs. D (P value)	Concentration [μmol/g-faeces]		Kruskal Wallis (P value)	Post hoc analysis (P value)
Parameters	Healthy (N = 16)	Disease (N = 11)	H vs. D (P value)	CE (N = 6)	SCL (N = 5)	Kruskal Wallis (P value)	H vs. CE	H vs. SCL	CE vs SCL
Succinic acid	0.09 [0.03—0.24]	6.61 [1.69—17.3]	< 0.001	4.30 [0.83—22.5]	7.24 [3.29—9.80]	< 0.001	0.003	0.001	> 0.999
Lactic acid	1.30 [0.41—4.40]	3.19 [0.92—5.91]	0.289	0.92 [0.63—3.63]	4.36 [3.19—7.30]	0.194	> 0.999	0.116	0.221
Formic acid	0.00 [0.00—0.07]	0.41 [0.14—0.65]	0.004	0.50 [0.32—0.75]	0.05 [0.00—0.41]	0.004	0.001	0.450	0.119
Acetic acid	77.9 [70.6—83.3]	48.1 [38.2—57.5]	< 0.001	40.6 [24.0—48.8]	58.4 [48.0—64.3]	< 0.001	< 0.001	0.039	0.405
Propionic acid	35.8 [33.3—43.8]	8.38 [4.50—16.6]	< 0.001	6.58 [4.36—9.09]	14.6 [5.93—18.6]	< 0.001	< 0.001	0.004	> 0.999
Butyric acid	9.98 [8.40—12.3]	8.88 [5.81—12.3]	0.368	7.53 [5.64—13.0]	8.88 [6.68—10.2]	0.631	0.566	0.836	> 0.999
Iso-Butyric acid	0.88 [0.59—1.25]	0.90 [0.55—1.58]	0.752	0.86 [0.46—1.02]	1.33 [0.75—1.82]	0.735	0.654	1.000	> 0.999
Valeric acid	0.04 [0.00—1.51]	0.00 [0.00—0.00]	0.069	0.00 [0.00—0.20]	0.00 [0.00—0.00]	0.124	0.504	0.071	0.536
Iso-Valeric acid	2.25 [1.33—3.01]	2.00 [1.21—2.46]	0.504	0.00 [0.00—0.00]	0.00 [0.00—0.00]	0.735	0.654	> 0.999	> 0.999

Values are expressed as the median (Q1–Q3, Q: quartile) for faecal organic acid concentrations. Comparison between the healthy (H) and disease (D) groups was performed using the Mann–Whitney U test. Subgroup analysis was performed using the Kruskal–Wallis test followed by post hoc multiple comparisons using Dunn’s test with Bonferroni adjustment.
CE chronic enteropathy, SCL small-cell lymphoma.

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