Aux abonnés absents : Liste rouge et téléphone portable dans les enquêtes en population générale sur les drogues

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Abstract
Missing Subscribers, The Red List and Mobile Telephones in General Population Surveys Concerning Drugs: Survey designers using Computer-Assisted Téléphone Interviews (CATI) are confronted with four types of populations: Owners of land-line telephones which include those on the Red (unlisted number) List; Owners of only mobile telephones; and those who don't own a telephone. Over the past few years, the proportion of land-line users has decreased as only mobile users increased. Even if the telephone remains an excellent means for contacting individuals residing in France (only 1.2% have no telephone), the increase in Red List numbers and only mobile users complicates methods developed since the early 1990; the choice of not contacting these persons should be made on a knowledgeable basis. Two types of research presented here allow us to extend our knowledge of these populations in relation to the use of psychoactive substances: a random survey of land-line users (n=13,685) allows us to characterize Red List members conceming declared drug use and associated opinions; a survey (n=2,009) concerning the social representation of drug users, including a sub-sample of only mobile users (n=201) permits us to obtain a summary description of the later and measure differences between them and line-liner users on these same questions.