Pittsburgh Youth Study Drug Constructs, Pittsburgh, Pennsylvania, 1987-2001

The Pittsburgh Youth Study (PYS) is part of the larger "Program of Research on the Causes and Correlates of Delinquency" initiated by the Office of Juvenile Justice and Delinquency Prevention in 1986. PYS aims to document the development of antisocial and delinquent behavior from childhood to early adulthood, the risk factors that impinge on that development, and help seeking and service provision of boys' behavior problems. The study also focuses on boys' development of alcohol and drug use, and internalizing problems.
PYS consists of three samples of boys who were in the first, fourth, and seventh grades in Pittsburgh, Pennsylvania public schools during the 1987-1988 academic year (called the youngest, middle, and oldest sample, respectively). Using a screening risk score that measured each boy's antisocial behavior, boys identified at the top 30 percent within each grade sample on the screening risk measure (n=~250), as well as an equal number of boys randomly selected from the remainder (n=~250), were selected for follow-up. Consequently, the final sample for the study consisted of 1,517 total students selected for follow-up. 506 of these students were in the oldest sample, 508 were in the middle sample, and 503 were in the youngest sample.
Assessments were conducted semiannually and then annually using multiple informants (i.e., boys, parents, teachers) between 1987 and 2010. The youngest sample was assessed from ages 6-19 and again at ages 25 and 28. The middle sample was assessed from ages 9-13 and again at age 23. The oldest sample was assessed from ages 13-25, with an additional assessment at age 35. Information has been collected on a broad range of risk and protective factors across multiple domains (e.g., individual, family, peer, school, neighborhood). Measures of conduct problems, substance use/abuse, criminal behavior, mental health problems have been collected.

This collection contains data and syntax files for drug constructs. The datasets include constructs on the use and frequency of use of marijuana, alcohol, cigarettes, and hard drugs.
The drug constructs were created by using the PYS raw data. The raw data are available at ICPSR in the following studies:
Pittsburgh Youth Study Youngest Sample (1987 - 2001) [Pittsburgh, Pennsylvania],
Pittsburgh Youth Study Middle Sample (1987 - 1991) [Pittsburgh, Pennsylvania] , and
Pittsburgh Youth Study Oldest Sample (1987 - 2000) [Pittsburgh, Pennsylvania].

匹兹堡青少年研究（PYS）是1986年由少年司法与犯罪预防办公室发起的大型“犯罪成因及相关因素研究项目”的一部分。PYS旨在记录从童年到成年早期反社会及犯罪行为的发展过程、影响该发展的风险因素，以及男孩行为问题的求助行为与服务提供情况。该研究还关注男孩酒精与药物使用的发展轨迹，以及内化问题（internalizing problems）。
PYS包含三个男孩样本，这些男孩在1987-1988学年就读于宾夕法尼亚州匹兹堡市公立学校的一年级、四年级和七年级（分别称为最年轻样本、中等年龄样本和最年长样本）。研究采用评估男孩反社会行为的筛查风险评分，从每个年级样本中选取评分前30%的男孩（n≈250），并从剩余人群中随机选取同等数量的男孩（n≈250）进行随访。因此，该研究最终纳入随访的样本共1517名学生：其中最年长样本506名，中等年龄样本508名，最年轻样本503名。
评估在1987年至2010年间进行，初期为半年一次，后期改为一年一次，数据来源包括多信息提供者（informants）（即男孩本人、父母及教师）。最年轻样本的评估覆盖6-19岁，并在25岁和28岁时进行追加评估；中等年龄样本评估覆盖9-13岁，23岁时追加评估；最年长样本评估覆盖13-25岁，35岁时追加评估。研究收集了跨多个领域（如个体、家庭、同伴、学校、社区）的广泛风险与保护因素信息，同时采集了品行问题、物质使用/滥用、犯罪行为及心理健康问题的相关测量数据。
本数据集包含药物相关构念（constructs）的数据及语法文件。数据集涵盖大麻、酒精、香烟及硬性毒品的使用情况及使用频率构念。
药物构念基于PYS原始数据构建。原始数据可通过ICPSR获取，对应研究如下：
匹兹堡青少年研究最年轻样本（1987-2001）[宾夕法尼亚州匹兹堡市]，
匹兹堡青少年研究中等年龄样本（1987-1991）[宾夕法尼亚州匹兹堡市]，
匹兹堡青少年研究最年长样本（1987-2000）[宾夕法尼亚州匹兹堡市]。