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IV iron sucrose showed no clear difference in number of responders ‐ active or inactive disease (6 weeks) compared with oral iron sulphate (low certainty).
It is very uncertain whether oral ferric maltol changes serious adverse events ‐ mild disease to quiescent (up to 52 weeks) compared with oral placebo (very low certainty).
Oral ferric maltol showed no clear difference in number of responders ‐ disease activity not stated (12 weeks) compared with IV ferric carboxymaltose (low certainty).
It is very uncertain whether oral ferric maltol changes serious adverse events (12 weeks) compared with IV ferric carboxymaltose (very low certainty).
IV ferric carboxymaltose showed no clear difference in number of responders ‐ mild to moderate disease (16 weeks) compared with oral iron sulphate (low certainty).
It is very uncertain whether IV ferric carboxymaltose changes serious adverse events ‐ mild to moderate disease (16 weeks) compared with oral iron sulphate (very low certainty).
IV iron isomaltoside showed no clear difference in number of responders ‐ remission or mild disease (8 weeks) compared with oral iron sulphate (low certainty).
It is very uncertain whether IV iron isomaltoside changes serious adverse events ‐ remission or mild disease (8 weeks) compared with oral iron sulphate (very low certainty).
It is very uncertain whether IM erythropoietin changes number of responders ‐ active disease (12 weeks) compared with oral placebo (very low certainty).
The review found no eligible studies for this question.
Intravenous preparations may leads to higher number of responders compared with oral preparations (low certainty).
It is very uncertain whether IV iron sucrose changes serious adverse events ‐ mild to moderate disease (20 weeks) compared with oral iron sulphate (very low certainty).
Intravenous preparations may leads to lower withdrawal due to adverse events compared with oral preparations (low certainty).
It is very uncertain whether oral iron sulphate changes serious adverse events ‐ active or inactive disease (14 days) compared with oral iron hydroxide polymaltose complex (very low certainty).
IV ferric carboxymaltose probably leads to higher number of responders ‐ mild to moderate disease (12 weeks) compared with IV iron sucrose (moderate certainty).
It is very uncertain whether IV ferric carboxymaltose changes serious adverse events ‐ mild to moderate disease (12 weeks) compared with IV iron sucrose (very low certainty).