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That the safest advice would be to advise PrEP takers that they can skip a dose ‘false negative’ may end up with an HIV infection, the researchers recommend Given that, while ‘false positives’ only waste money, but a ‘false negatives’ if participants were absolutelyĬertain they would not have sex the following day.
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PrEP doses taken would actually being needed. Was a substantial number of ‘false positives’, to the extent that only 20% of Group of gay men similar to those in this study were told to take PrEP if they Negatives’: cases where people had ended up having sex even though they had Looked at whether participants had predicted it, they found a number of ‘false This strategy would have to be quite strict, however.Īlthough participants generally overestimated their chances of having sex, when Participants: “take PrEP daily unless you are definitely not going to have sex Might be safer, and in certain situations more cost-effective, they comment, to tell Studies have tended to instruct participants to take PrEP if they think they are likely to have sex the next day, it Implications for studies of intermittent PrEP: while so far intermittent-PrEP The researchers comment that these findings have
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Sex, and if they thought there was no chance, they did not end up having sex. Only if men rated their chances of sex as very low were their forecastsĪccurate: for instance, where men rated their chances as 1-10%, about 5% had Said they thought there was a 100% chance of sex the following day, only 58%Īctually had it: if a 50% chance, only 20% had it if a 20% chance, only 10% Rather than underestimate their chances of casual sex the following day. Sex and its occurrence, the men were in general more likely to overestimate Only one in six had a current steady relationship.įifty-nine per cent reported they had sex on three or more days per week.Ī pill or liquid which looks and tastes exactly like a real drug, but contains no active substance.Īlthough there was a correlation between the prediction of Were in full-time work, part-time work and unemployed/student and two-thirds Their mean age was 33īut a quarter were under 22 and a quarter over 44 54% were white, 14% black andġ4% Latino 16% defined as bisexual, rather than gay roughly equal proportions Likelihood, from zero to 100%, that they would also have anal sex with a casual (where sex meant “anal intercourse with a casual partner”) and also rate the The men were asked to say whether they had had sex Men (MSM) from New York aged over 18 were asked to keep online sexual diariesĬompletion rate was 78%. In this study, 92 gay men and other men who have sex with The sexual optimists, on the other hand, were oftenĭisappointed: only 45% of men who predicted a 90% chance of sex the following day actually ended up having it. Then, sure enough, only about 4% actually ended up having sex and there was noĬase in which someone had sex after having predicted that there was zero chance of them having sex theįollowing day. Men reported that there was only a zero to 5% chance of sex the following day Have sex the next day was in the days they predicted it was very unlikely: if The only time men accurately predicted whether they would Happened, found that men generally overestimated the likelihood they would have The following day, and then compared their prediction with what actually Men from New York were asked to predict each day whether they would have sex A study in which a group of HIV-negative gay and bisexual