National Household Survey on Drug Abuse, 2000. Statistical Inference

摘要

Starting in 1999 and continuing through 2000, 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), 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. Using the 50-State design, States were first stratified into a total of 900 field interviewer (FI) regions (48 regions in each large sample State and 12 regions in each small sample State). Within FI regions, adjacent Census blocks were combined to form the first-stage sampling units called 'segments.' Eight sample segments per FI region were fielded during the 2000 survey year. These sampled segments were allocated equally into four separate samples, one for each 3-month period during the year, so that the survey is essentially continuous in the field. For more detailed information on the sample design, see the 2000 NHSDA sample design report (Bowman, Penne, Chromy, & Odom, 2002).