Effects of high intake of cod or salmon on gut microbiota profile, faecal output and serum concentrations of lipids and bile acids in overweight adults: a randomised clinical trial

Table 4 Faecal output at baseline and after 8 weeks*

	Baseline		8 weeks		P†	P‡
	Median	25th, 75th percentile	Median	25th, 75th percentile	P†	P‡
Total wet weight of faeces, g/day
Cod group	189	107,238	183	129,227	0.65	0.53
Salmon group	133	80,228	131	68,190	0.61
Control group	145	81,198	130	77,197	0.53
Total dry weight of faces, g/day
Cod group	42	27,63	39	29,58	0.65	0.61
Salmon group	34	16,51	27	23,30	0.12
Control group	29	22,39	20	16,37	0.73
Cholesterol, µmol/day
Cod group	829	532,1139	938	703,1255	0.65	0.56
Salmon group	699	276,1592	524	258,941	0.14
Control group	760	347,2201	538	253,1460	0.24
Total fatty acids, g/day
Cod group	6.47	3.94,12.52	7.21	4.18,9.33	0.80	0.61
Salmon group	5.63	3.40,8.22	5.88	3.49,9.48	0.31
Control group	4.24	3.16,7.79	4.62	2.23,8.33	0.53
Total bile acids, µmol/day
Cod group	199	183,208	205	188,209	0.14	0.63
Salmon group	198	182,204	203	192,210	0.67
Control group	193	171,210	197	163,211	0.72

Medians and 25th and 75th percentiles
^*No differences were seen between the groups at the baseline (Kruskal–Wallis test). Results are presented for 10 participants in the Cod group, 15 participants in the Salmon group and 12 participants in the control group
^†Within-group changes are tested using the Wilcoxon’s signed-ranks test
^‡Changes within the Cod group, Salmon group and Control group are compared using the analysis of covariance (ANCOVA) with adjustment for baseline values after log transformation