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Abstract
Recent epidemiologic studies of the cognitive performance of injecting drug users have demonstrated the need to establish appropriate test norms for this population. This report provides normative data from a group of 150 injecting drug users on a battery of standardized tests of cognitive performance stratified by age group (range 20 to 49 years) and educational level (mean 11.6, standard deviation 2.0). The analysis also includes estimation of partial correlations between neuropsychologic test scores and age and education. The analysis demonstrates that age and education are important determinants of performance for several of these tests, and provides norms that may be of use as a reference for clinical evaluation and research in drug user populations.