It is very uncertain whether any‐treatment‐dose vitamin D (greater than 400 IU/day) changes withdrawals due to adverse events compared with supplemental‐dose vitamin D (less than 400 IU/day) (very low certainty).
It is very uncertain whether high‐treatment‐dose vitamin D (greater than 1000 IU/day) changes withdrawals due to adverse events compared with low‐treatment‐dose vitamin D (400 IU/day to 1000 IU/day) (very low certainty).
Vitamin A leads to higher adverse events: minor gastrointestinal symptoms compared with placebo (high certainty).
The review found no eligible studies for this question.
Steroid plus vitamin D leads to lower number of participants withdrawing due to adverse events compared with vitamin D (high certainty).
It is very uncertain whether vitamin D (all doses) changes withdrawals due to adverse events compared with placebo/no treatment (very low certainty).
The review found no eligible studies for this question.
The review found no eligible studies for this question.
It is very uncertain whether summary of Findings Table ‐ Vitamin D changes adverse events (any grade) compared with placebo or standard care alone (very low certainty).
The review found no eligible studies for this question.
It is very uncertain whether vitamin D plus calcium changes adverse events (number) Asymptomatic hypercalcaemia and hypercalciuria compared with calcium (very low certainty).
The review found no eligible studies for this question.
Vitamin D supplementation may leads to lower maternal adverse events: severe postpartum haemorrhage compared with placebo or no intervention (low certainty).
Summary of findings: oral vitamin E supplementation showed no clear difference in adverse events compared with placebo or no treatment (low certainty).
Homocysteine‐lowering interventions (Vitamin B6 (pyridoxine;… showed no clear difference in adverse events compared with placebo or standard care (high certainty).
Vitamin D plus calcium showed no clear difference in adverse events: renal calculi compared with placebo (moderate certainty).
Neonatal vitamin A supplementation showed no clear difference in adverse events during first 48‐72 hours post supplementation ‐… compared with control (high certainty).