@article{ref1,
title="Test-retest reliability of a lifetime drug use questionnaire",
journal="Addictive behaviors",
year="2005",
author="Czermak, Christoph and Lehofer, Michael and Gasser-Steiner, Peter and Ettinger, Sandra and Lemonis, Leonidas and Rohrhofer, Alfred and Legl, Thomas and Liebmann, Peter M.",
volume="30",
number="2",
pages="361-368",
abstract="By adopting the investigational principle of the Lifetime Drinking History (LDH) interview, we developed a Lifetime Drug Use (LDU) Questionnaire to assess the amount and frequency of lifetime drug consumption. The Pearson Correlation Coefficients for test-retest reliability, investigated in a sample of N=47 residents of a drug rehabilitation center and averaged over the investigated seven drug categories, were r=.95 for the abstinence-corrected total duration of regular use, r=.89 for the mean number of consumption days per month of regular use, r=.89 for the mean daily amount, r=.83 for the variability in consumption days per month of regular use, and r=.75 for month variability in daily amount. Applicability and further research needs are discussed.<p /><p>Language: en</p>",
language="en",
issn="0306-4603",
doi="10.1016/j.addbeh.2004.05.005",
url="http://dx.doi.org/10.1016/j.addbeh.2004.05.005"
}