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Table 1 Demographic and clinical data at inclusion and during the study period

From: Differences in bacterial taxa between treatment-naive patients with major depressive disorder and non-affected controls may be related to a proinflammatory profile

Demographic and clinical data for participants during the study

MDD

nonMDD

MDD vs. nonMDD

Baseline

4 weeks

12 weeks

p-value

Baseline

4 weeks

12 weeks

p-value

p-value

Age (years)

20.9 ± 4.2

   

23.7 ± 10.7

   

0,001

Gender (% female)

76% (16/21)

   

83% (25/30)

   

0,66

BMI (kg/m2)

24.4 ± 5.1

   

23.0 ± 2.8

   

0,168

Smoking (yes)

20% (4/21)

   

20% (6/30)

   

0,914

MDI

40.3 ± 6.9

35.5 ± 8.2

29.4 ± 12.1

*0.13 / § 0.02

4.9 ± 4.2

3.7 ± 2.7

5.0 ± 4.4

*0.03 / § 0.45

< 0.0001

Active antidepressant medical treatment (yes)

0% (0/21)

85.7% (12/14)

83.3% (10/12)

 

0% (0/30)

0% (0/30)

0% (0/30)

  

Gastrointestinal symptoms (yes)

50% (10/21)

64. % (9/14)

58.3% (7/12)

 

10% (3/30)

6.7% (2/30)

10% (3/30)

  

Bristol Stool Scale Score

3.5 ± 0.6

3,3 ± 1,0

3.4 ± 1.2

*0.18 / § 0.53

3.5 ± 0.6

3.7 ± 0.6

3.7 ± 0.8

*0.33 / § 0.41

0,85

  1. Values are presented as mean (± SD) or as percentages (n/total). Gastrointestinal symptoms covered stomach pain, constipation, nausea, and diarrhea. * Comparison between baseline and four weeks samples. § comparison between baseline and twelve weeks samples. BMI: Body mass index. MDI: Major depressive inventory