Avery 1999b.

Methods	Surgical teams were randomised to one of two groups ‐ details of method of randomisation not given. Allocation concealment using sealed envelopes. Perforation test gloves filled with 500 mls water
Participants	Surgical operator and assistant. Dental surgery. 260 single gloves and 251 double outer gloves were collected
Interventions	Single versus standard double gloves
Outcomes	Number of perforations.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate