The Drug Use Index: A Measure of the Extent of Polydrug Usage

Abstract
A drug use index (DUI) was constructed from actual usage data of 1121 human respondents (517 males and 604 females). This index probably represents a quantitative measure of the degree of involvement in polydrug use. Correlations between the DUI and use of 19 drugs or drug classes were reported. Some applications of the DUI were demonstrated with specific reference to 4 psycho-personality tests.

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