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The opiate dependence syndrome: replication study using the SODQ in a New York clinic.

Summary 
 
Two papers have appeared in the literature recently reporting the use of the Severity of Opiate Dependence Questionnaire (SODQ) with American and British samples of opiate addicts. This paper presents the findings of a third study. The SODQ was completed by a further 126 subjects attending the original New York Clinic and the results largely confirmed our earlier findings: first the four main sections of the SODQ each give a strong first factor and secondly when these are combined a strong overall factor emerges. These results are again at variance with those found in the British sample and possible reasons briefly discussed.