Baseline characteristics of participants
| Placebo | Vitamin D | Vitamin D+Probiotic | |
|---|---|---|---|
| Participants n | 18 | 17 | 16 |
| Female n | 17 | 15 | 15 |
| Mean age (±SD) | 36 (±15) | 34 (±12) | 34 (±14) |
| IBS subtype n | |||
| Mixed | 10 | 7 | 11 |
| Constipation | 2 | 5 | 2 |
| Diarrhoea | 6 | 5 | 3 |
| Vitamin D status | |||
| Deficient | 14 | 14 | 12 |
| Replete | 4 | 3 | 4 |
| Mean serum 25OHD ng/mL (±SD) | 15 (±8.4) | 14 (±8.3) | 16 (±8.0) |
| Mean IBS severity score (±SD) | 243 (67) | 244 (92) | 237 (67) |
25OHD, 25-hydroxyvitamin D; IBS, Irritable bowel syndrome.