Table 1.
Demographic details and baseline characteristics of all participants and group assignment after randomisation
| Min-Max | Whole sample (N = 71) | Probiotic (N = 35) | Placebo (N = 36) | ||||
|---|---|---|---|---|---|---|---|
| Mean | s.d. | Mean | s.d. | Mean | s.d. | ||
| Age | 18–55 | 28.80 | 8.93 | 27.94 | 6.99 | 29.64 | 10.52 |
| BMI | 18.5–30 | 23.00 | 2.90 | 23.03 | 3.00 | 22.97 | 2.84 |
| EPQ-N | – | 15.97 | 4.25 | 15.60 | 4.94 | 16.34 | 3.45 |
| EPQ-P | – | 3.32 | 2.37 | 3.17 | 2.48 | 3.48 | 2.29 |
| EPQ-E | – | 10.15 | 5.30 | 9.40 | 5.07 | 10.93 | 5.50 |
| N | % | N | % | N | % | ||
| Gender | Male | 26 | 36.6 | 13 | 37.1 | 13 | 36.1 |
| Female | 45 | 63.4 | 22 | 62.9 | 23 | 63.9 | |
| Ethnicity | Caucasian | 58 | 81.7 | 29 | 82.9 | 29 | 80.6 |
| Black | 1 | 1.4 | 0 | 0 | 1 | 2.8 | |
| Hispanic | 1 | 1.4 | 0 | 0 | 1 | 2.8 | |
| Asian | 10 | 14.1 | 5 | 14.3 | 5 | 13.9 | |
| Mixed | 1 | 1.4 | 1 | 2.9 | 0 | 0 | |
| Education | Secondary | 22 | 31 | 13 | 37.1 | 9 | 25 |
| Undergraduate | 16 | 22.5 | 7 | 20.0 | 9 | 25 | |
| Postgraduate | 33 | 46.5 | 15 | 42.9 | 18 | 50 | |
BMI, body mass index; EPQ, Eysenck Personality Questionnaire (–N, neuroticism; –P, psychoticism; –E, extrovert).