@article{ref1,
title="Assessing age-of-onset data on substance use among New York State public secondary school students",
journal="American journal of drug and alcohol abuse encompassing all addictive disorders",
year="1977",
author="Uppal, G. S. and Babst, D. V. and Schmeidler, J.",
volume="4",
number="4",
pages="505-515",
abstract="This study was designed to assess the quality of age-of-onset data obtained in a state-wide secondary school survey on substance use. A representative sample (8,553), consisting of New York State students in public secondary schools (Grades 7-12) responded to a questionnaire during winter 1974/75. For each of eight substances, a parallel comparison was performed. The ages of onset for students of different current ages (12-17) were compared. All substances except alcohol and tobacco displayed similar patterns of age-of-onset response. The apparent discrepancies for alcohol and tobacco may be due to either a real instability in the age-of-onset pattern or to a recall error. The results of the study suggest that retrospective questions may provide useful information, particularly when they relate to memorable events.<p /><p>Language: en</p>",
language="en",
issn="0095-2990",
doi="",
url="http://dx.doi.org/"
}