Jensen 1997.

Methods	Principle and first surgeons randomised to one of two groups using sealed envelopes. Details of method of randomisation not given. Perforations tested by filling with water, gently manipulating water into each digit and observing for leaks.
Participants	Principle and first surgeons. Abdominal surgery. 200 single gloves and 200 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