Probiotics, Symptoms, and Gut Microbiota: What Are the Relations? A Randomized Controlled Trial in Subjects with Irritable Bowel Syndrome

Table 2

“Treatment effect” (increase during active treatment minus increase during placebo treatment) on symptoms, proportions of the fecal microbiota, and on fecal diversity.

Variables	Mean	95% CI of the mean	Statistics; (P values)
IBS symptom score	1.57	0.10; 3.05	P = 0.04
Bacteroides	−0.01	−0.11; 0.08	ns (P = 0.77)
Faecalibacterium	−0.03	−0.18; 0.12	ns (P = 0.63)
Lachnospiraceae	0.05	−0.03; 0.13	ns (P = 0.18)
“Common” Simpson’s D	−0.04	−0.15; 0.08	ns (P = 0.50)