Table 3.

The detailed characteristics of the applied vitamin D supplementation intervention and mental health outcomes for the studies of the inflammatory bowel disease (IBD) patients included to the systematic review.

Ref.	Vitamin D Measure	Intervention—Vitamin D Supplementation	Mental Health Outcome	Psychological Measure
[32]	25(OH)D vitamin D level in blood Three 24-h dietary recalls	25–125 µg/day for 24 weeks while 25(OH)D vitamin D level in blood was controlled each 2 weeks and in case of result of <100 nm/L, the doses of vitamin D were gradually increased	Disease-specific quality of life	IBDQ
[33]	25(OH)D vitamin D level in blood	25(OH)D vitamin D level in blood was controlled each 2 weeks and in case of result of <75 nm/L, the supplementation of vitamin D was applied at dose of 1250 µg/week or 2 weeks, for at least 12 weeks	Disease-specific quality of life	SIBDQ
[34]	25(OH)D vitamin D level in blood	25 µg vs. 250 µg/day for 12 months	Anxiety and depression	HADS
[35]	25(OH) vitamin D levels in blood Three 24-h dietary recalls	25 µg vs. 50 µg/week for 12 weeks	Disease-specific quality of life	IBDQ-9

25-hydroxyvitamin D (25(OH)D); IBDQ—The Inflammatory Bowel Disease Questionnaire; SIBDQ—Short Inflammatory Bowel Disease Questionnaire; HADS—Hospital Anxiety and Depression Scale.