1. Nonlatex versus latex: hazard ratio of pregnancy.
| Trial | Comparison | Nonlatex probability | Latex probability |
| Steiner 2003 | eZ·on versus Kimono Select | 9.0 (95% CI 5.9 to 12.2)* | 5.4 (95% CI 2.9 to 7.8)* |
*stratified by site and prior condom experience
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