Does additional lubrication affect condom slippage and breakage?

The risk of condom slippage (1.94%) and breakage (0.89%) among 3607 condoms was analysed with respect to the use of additional lubricant. Whether or not lubricant was used, the site at which it was applied and the type of lubricant used were all found to vary significantly with the type of sexual act(s) for which the condoms were used. Little evidence was found for differing effects of type of additional lubricant (water-based, saliva or other) or site of lubricant use ton penis/inside condom, on condom, in vagina/anus). The use of lubricant more than doubles the risk of slippage for vaginal sex. While anal sex is associated with much higher risks of slippage the use of lubricant for this practice actually reduces the risk of slippage to that similar for vaginal sex where lubricant is used. No significant effect of additional lubricant on condom breakage was observed. It is recommended that education messages concerning the use of additional lubricant may need to change to take into account the varied nature of lubricant use practices and the differential effects of lubricant with respect to sexual practices. Specifically, if the use of additional lubricant has little or no impact on condom breakage but increases condom slippage then encouraging its use may be counterproductive if condom users consider slippage to be a reason not to use condoms.