Table 1 Demographic Characteristics and Psychological Scales.

From: The gut microbiome in social anxiety disorder: evidence of altered composition and function

 

SAD (n = 31)

Controls (n = 18)

p value

Age (years); mean (SD)

36.0 (11.96)

41.7 (10.79)

0.10

Gender; % female (n)

48.4 (15)

66.7 (12)

0.25

Race; % Caucasian (n)

100 (31)

94.4 (17)

0.37

Years of Education; mean (SD)

17.32 (4.32)

19.25 (4.89)

0.16

Delivery mode at birth

   

 • Vaginal

74.2 (23)

83.3 (15)

0.74

 • Caesarean section

6.5 (2)

5.6 (1)

 • Unknown

19.3 (6)

11.1 (2)

BMI (kg/m2); mean (SD)

28.02 (5.0)

24.22 (4.49)

0.01 *

Alcohol (units per week); mean (SD)

5.52 (7.4)

2.63 (3.1)

0.78

Alcohol categories; % (n)

   

 • 0–3 units/week

58.1 (18)

72.2 (13)

0.21

 • 4–9 units/week

16.1 (5)

22.2 (4)

 • ≥ 10 units/week

25.8 (8)

5.6 (1)

Smoking status; % smokers (n)

12.9 (4)

5.6 (1)

0.64

Exercise (IPAQ score); mean (SD)

3143.89 (3769.34)

5816.17 (4650.98)

0.04 *

Exercise (IPAQ category); % (n)

   

 • Low

25.8 (8)

5.6 (1)

0.054

 • Moderate

35.5 (11)

16.7 (3)

 • High

38.7 (12)

66.7 (12)

Bristol Stool Chart; % (n)

   

 • Score 1

0 (0)

0 (0)

0.50

 • Score 2

22.6 (7)

11.1 (2)

 • Score 3

32.3 (10)

38.9 (7)

 • Score 4

29.0 (9)

38.9 (7)

 • Score 5

6.4 (2)

11.1 (2)

 • Score 6

9.7 (3)

0 (0)

Comorbidity: % (n)

   

Past history of MDD

74.2 (23)

0 (0)

<0.0005 *

Other anxiety disorder (total)

35.5 (11)

0 (0)

 

 • Agoraphobia

22.6 (7)

<0.0005 *

 • GAD

6.5 (2)

 • Panic Disorder

3.2 (1)

 • Multiple

3.2 (1)

Psychotropic medication % (n)

   

 • No medication

32.3 (10)

100 (18)

<0.0005 *

 • Taking medication

67.7 (21)

0 (0)

◦ SSRI

48.4 (15)

 

◦ SNRI

9.7 (3)

 

◦ Other regular anxiolytic

22.6 (7)

 

◦ As required Beta-blocker

12.9 (4)

 

◦ As required Benzodiazepine

6.4 (2)

 

Social anxiety scale scores

   

LSAS; mean (SD)

   

 • Fear Subscale

44.94 (11.91)

10.67 (10.31)

<0.0005 *

 • Avoidance subscale

38.16 (13.47)

8.33 (10.54)

<0.0005 *

 • Social interaction subscale

39.13 (13.19)

9.2 (10.38)

<0.0005 *

 • Performance subscale

43.68 (14.04)

9.67 (9.71)

<0.0005 *

 • Total

83.13 (24.77)

19 (19.61)

<0.0005 *

  1. BMI Body Mass Index, GAD Generalised Anxiety Disorder, IPAQ International Physical Activity Questionnaire, LSAS Liebowitz Social Anxiety Scale, MDD: Major Depressive Disorder, PSQI Pittsburgh Sleep Quality Index, SAD Social Anxiety Disorder, SD Standard Deviation, SNRI Serotonin and Norepinephrine Reuptake Inhibitor, SSRI Selective Serotonin Reuptake Inhibitor
  2. p values based on Fisher’s exact test for categorical variables and Student’s T-tests for all continuous variables apart from alcohol (units per week) which was a nonparametric Mann-Whitney U test. p-values reaching statistical significance are accompanied by an asterisk.