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Summary The application of a dimensional concept of dependence which has received much attention over recent years in relation to alcohol, is explored here in relation to opiate dependence. A Severity of Opiate Dependence Questionnaire (SODQ) was completed by 98 subjects attending a New York drug treatment clinic. The factor structure of this questionnaire was explored and a strong first factor (39% of variance) identified which loaded on items conceptually related to a dimensional opiate dependence syndrome. Some preliminary investigation was made of issues relating to validity: SODQ correlated significantly with ‘number affixes a day’ and with a subjective measure of dependence (OSDQ), but not with quantity of heroin used or milestones in drug career. Research leads are discussed.
Sutherland et al. (Tue,) studied this question.
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