Trussell 1992.

Methods	Randomized, crossover trial. One center in United States. Blinding not reported.
Participants	50 couples aged 18 to 55 years in monogamous heterosexual relationship and currently using oral contraceptive, Norplant, IUD or sterilization for contraception if still fertile. Excluded pregnancy, lactation and STI.
Interventions	Couples were assigned to use 5 condoms of each of the 2 condom types in an alternating sequence over a 5‐week period. Half of the couples started with the polyurethane condom and the other half started with the latex condom. The polyurethane condom Tactylon (Tactyl Technologies) versus the latex condom Trojan‐Enz (Carter‐Wallace, Inc.).
Outcomes	Condom breakage and slippage; acceptability.
Notes	Randomization and allocation concealment methods not described. 2% loss to follow up and early discontinuation.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	No information

STD = sexually transmitted disease(s)

STI = sexually transmitted infection(s)