Most of them live in developing countries, and slightly more than half are girls. Two approaches with potential for reaching large numbers of out-of-school adolescents—although not necessarily as stand-alone programmes for preventing pregnancy—involve the use of the mass media and interactive radio instruction. Some reduced the number of partners for women, decreased their frequency of casual sex or sex with “sugar daddies” and increased abstinence. An evaluation found that, compared with those who did not view the programming, viewers were 87 per cent more likely to use condoms, and 67 per cent more likely to have used a condom the last time they had sex.