National Household Survey on Drug Abuse, 2001. Statistical Inference Report

摘要

Starting in 1999 and continuing through 2001, the National Household Survey on Drug Abuse (NHSDA) was implemented as part of a 5-year 50-State sample design to provide national and State estimates of drug use through 2003. A major change to the study protocol was the introduction of computer-assisted interviewing (CAI) methods for both the screening and interviewing of selected respondents. For the 5-year 50-State design, 8 States were designated as large sample States (California, Florida, Illinois, Michigan, New York, Ohio, Pennsylvania, and Texas) and provided with samples large enough to support direct State estimates. For the remaining 42 States and the District of Columbia, smaller, but adequate, samples were selected to support State estimates using small area estimation (SAE) techniques. Also included in the 2001 survey was an experimental study to evaluate the effectiveness of respondent incentives in improving response rates. In the first two quarters of 2001, a randomized, split-sample experimental design was included with the main study data collection of the NHSDA to compare the impact of $20 and $40 incentive treatments with a $0 control group on measures of respondent cooperation, data quality, survey costs, and population substance use estimates. To control for interviewer effects, the same FIs were required to work all of the control and treatment cases in an FI region whenever possible.