Nicolai 1997.

Methods	Patients were randomised to one of two groups using sealed envelopes. Details of method of randomisation not given. Perforation test ‐ gloves filled with 1000 mls of water and cuff twisted through 360 degrees.
Participants	Surgeon, assistant and scrub nurse. Orthopaedic surgery ‐ major joint replacement. 153 double outer gloves and 209 indicator outer gloves were collected.
Interventions	Standard double versus perforation indicator system.
Outcomes	Number of perforations. Proportion of total number of perforations detected by glove wearer during surgery.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate