Azabache 1987 A.

Methods	Randomised controlled trial. Randomisation method stated as simple. Patient and surgeon blinded. Unclear blinding of outcome assesor.
Participants	258 eligible patients. 92 excluded before randomisation. 166, 88 males and 78 females enrolled in the study. Age‐range: 6‐71 Mean: 23 12 patients excluded after randomisation. The study has 2 subgroups (see Azabache 1987 B). In Azabache 1987 A 110 patients enrolled in study.
Interventions	Treatment group: Gentamycin 4 mg/kg and Clindamycin 15 mg/kg one hour inter‐operatively hereafter Gentamycin eighthourly and Clindamycin sixhourly for 24 hours if appendix was suppurativ and 72 hours if appendix was gangrenous/perforated. Placebo group: Not stated. Regime as above.
Outcomes	Wound infection (Pus in the cellular space under or above the rectusmuscle 3 weeks postoperatively)
Notes	No drain treatment.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear