Intratympanic corticosteroids probably leads to higher ear pain: timing not reportedf compared with systemic corticosteroids (moderate certainty).
Intramuscular corticosteroids showed no clear difference in relapse compared with oral corticosteroids (low certainty).
Intramuscular corticosteroids showed no clear difference in adverse events compared with oral corticosteroids (low certainty).
Intramuscular corticosteroids showed no clear difference in symptom persistence compared with oral corticosteroids (low certainty).
Intramuscular corticosteroids showed no clear difference in 24‐hour beta agonist use compared with oral corticosteroids (low certainty).
Mild/moderate topical corticosteroids may leads to lower low birth weight compared with no topical corticosteroids (low certainty).
Mild/moderate topical corticosteroids may leads to lower preterm delivery compared with no topical corticosteroids (low certainty).
Mild/moderate topical corticosteroids may leads to lower foetal death compared with no topical corticosteroids (low certainty).
Mild/moderate topical corticosteroids may leads to lower low Apgar score compared with no topical corticosteroids (low certainty).
Mild/moderate topical corticosteroids may leads to lower congenital abnormality compared with no topical corticosteroids (low certainty).
Mild/moderate topical corticosteroids may leads to lower orofacial cleft compared with no topical corticosteroids (low certainty).
Corticosteroids may leads to higher clinical improvement (dichotomous) compared with placebo (low certainty).
Corticosteroids probably leads to higher histological improvement (dichotomous) compared with placebo (moderate certainty).
The review found no eligible studies for this question.
Corticosteroids may leads to lower withdrawals due to adverse events 12 to 50 weeks compared with placebo (low certainty).