Antibiotics showed no clear difference in adverse events ‐ diarrhoea compared with placebo overall (moderate certainty).
Antibiotics may leads to lower total postoperative infections ‐ early and late compared with placebo (low certainty).
Antibiotics probably leads to lower pelvic infection compared with placebo (moderate certainty).
It is very uncertain whether antibiotics changes other serious infections compared with placebo (very low certainty).
Antibiotics probably leads to lower postoperative fever compared with placebo (moderate certainty).
It is very uncertain whether antibiotics changes total adverse effects compared with placebo (very low certainty).
Antibiotics probably leads to lower urinary tract infection compared with placebo (moderate certainty).
Antibiotics probably leads to lower pelvic infection compared with placebo (moderate certainty).
It is very uncertain whether antibiotics changes other serious infections compared with placebo (very low certainty).
Antibiotics probably leads to lower postoperative fever compared with placebo (moderate certainty).
The review found no eligible studies for this question.
Antibiotics may leads to lower total postoperative infections ‐ early and late compared with placebo (low certainty).
Antibiotics probably leads to lower abdominal wound infection compared with placebo (moderate certainty).
Antibiotics probably leads to lower urinary tract infection compared with placebo (moderate certainty).
Antibiotics showed no clear difference in number of participants who were not cured at compared with placebo or no treatment (low certainty).
Antibiotics showed no clear difference in number of participants rehospitalised for a respiratory illness compared with placebo or no treatment (low certainty).
Antibiotics showed no clear difference in proportion of participants with recurrent wheeze compared with placebo or no treatment (low certainty).
Antibiotics probably leads to higher complete resolution of OME at 2 to 3 months compared with placebo, no treatment or therapy of unproven effectiveness (moderate certainty).
Antibiotics may leads to higher adverse effects compared with placebo, no treatment or therapy of unproven effectiveness (low certainty).
Antibiotics may leads to higher complete resolution of OME at more than 6 months compared with placebo, no treatment or therapy of unproven effectiveness (low certainty).