The National Commission on Marihuana and Drug Abuse sponsored the first two studies conducted in 1971 and 1972. The Preliminary Results report also provides specific results for marijuana and hashish, cocaine, other illicit drugs, alcohol, and tobacco by age and major demographic variables. Its technical appendices review the survey methodology, limitations of the data, other major data sources, and relevant references.
Information is presented in tabular form with little or no explanatory text.
For each variable on the public use file, the codebook provides the SAS variable name, the interview instrumentation source, value codes and their meanings, and an unweighted univariate frequency distribution. 2 Trend tables in this report excluded data on 1990 in order to add the new 1997 data. Trend tables in this Main Findings report also exclude 1990 data.