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Exhibit 2.1 2003 NSDUH Sample Design Summary (continued) Using an electronic screening instrument also provided the ability to impose a more complicated person-level selection algorithm at the third stage of selection. As a result of this unique design feature, any two survey-eligible people within a dwelling unit had some chance of being selected— i.e., all survey-eligible pairs of people had some non-zero chance of being selected. This design feature is of interest to NSDUH researchers because it allows analysts to examine how the drug use propensity of one individual in a family relates to that of other family members residing in the same dwelling unit (e.g., the relationship of drug use between a parent and child). Originally added in 2002 with use continuing in 2003, an additional parameter in the person selection process increased the number of selected pairs within dwelling units without unduly diminishing response rates. As illustrated in Table 2.1, at the third stage of selection, 81,631 people were selected from 130,605 screened and eligible dwelling units. A total of 67,784 completed interviews were obtained from these 81,631 selected persons. Expected Precision of NSDUH Estimates The multistage, stratified NSDUH design has been optimally constructed to achieve specified precision for various person subpopulations of interest. These SAMHSA-specified, precision requirements call for the expected relative standard error on a prevalence of 10 percent not to exceed the amounts listed below. For the main study: • 3.00 percent for total population statistics; • 5.00 percent for statistics in four age group domains: 12-17, 18-25, 26-34, 35 and over; • 11.00 percent for statistics computed among Hispanics in four age group domains: 12- 17, 18-25, 26-34, 35 and over; • 11.00 percent for statistics computed among non-Hispanic blacks in four age group domains: 12-17, 18-25, 26-34, 35 and over; and • 5.00 percent for statistics computed among non-Hispanic, non-blacks in four age group domains: 12-17, 18-25, 26-34, 35 and over. To achieve these precision requirements and meet State sample-size requirements, the optimal person-level sample distribution by strata was determined that minimized data collection costs while simultaneously meeting the above-specified precision requirements for several critical NSDUH outcome measures. The precision constraints in the design optimization models were set up using local area predictions of drug use from a project involving small area estimation techniques to generate local area estimates from 1991–1993 NSDUH data. Drug use estimates across strata were appropriately scaled to reflect the generic 10 percent prevalence. 1 For reporting and stratification purposes, the District of Columbia is treated the same as a State and no distinction is made in the discussion. 2 The four categories are defined as: (1) MSA/low SES, (2) MSA/high SES, (3) NonMSA/low SES, and (4) NonMSA/high SES. 3 In summary, this technique states that if a dwelling unit is selected for the NSDUH and an interviewer observes any new or missed dwelling units between the selected dwelling unit and the dwelling unit appearing immediately after the selection on the counting and listing map page, then all new/missed dwellings between the selection and the next one listed will be selected. If a large number of new/missed dwelling units are encountered (generally greater than ten) then a sample of the missing dwelling units will be selected. 10
Table 2.1 Sampling Summary of 2003 Main Study NSDUH Statistic Small States Big States Total Total Sample FI Regions 516 384 900 Segments 4,128 3,072 7,200 Selected Lines 97,847 72,915 170,762 Eligible Dwelling Units 81,616 61,869 143,485 Completed Screening interviews 75,491 55,114 130,605 Selected Persons 46,374 35,257 81,631 Completed Interviews 38,934 28,850 67,784 Average per State FI Regions 12 48 Segments 96 384 Selected Lines 2,276 9,114 Completed Interviews 905 3,606 Interviews Per Segment 9.43 9.39 Average per State And Quarter Segments per FI Region 2 2 Interviews per FI Region 18.85 18.78 Interviews per Segment 9.43 9.39 Total States 43 8 51 Total Interviewers (approximate number that varied by quarter) 470 348 818 Note: "Small" States refers to States where the design yielded 905 respondents on average. "Big" States refers to States where the design yielded 3,606 respondents on average. 11
Page 1 and 2: 2003 National Survey on Drug Use an
Page 3 and 4: Table of Contents Chapter Page List
Page 5 and 6: Table of Contents (continued) Chapt
Page 7 and 8: List of Tables (continued) Table 6.
Page 9 and 10: List of Tables (continued) Table 7.
Page 11 and 12: List of Exhibits Exhibit 2.1 2003 N
Page 13 and 14: 1. Introduction The 2003 National S
Page 15 and 16: 2. Sampling and Counting/Listing Op
Page 17 and 18: segment it was apparent the segment
Page 19 and 20: working in and around their campuse
Page 21: Exhibit 2.1 2003 NSDUH Sample Desig
Page 25 and 26: 3. Data Collection Staffing The mag
Page 27 and 28: The work of an interviewer requires
Page 29 and 30: quarter to quarter varied, so FSs h
Page 31 and 32: Exhibit 3.1 NSDUH Management Chart
Page 33 and 34: Exhibit 3.3 Flow of FI Recruiting A
Page 35 and 36: Exhibit 3.3 Flow of FI Recruiting A
Page 37 and 38: 4. Preparation of Survey Materials
Page 39 and 40: • NSDUH Guide Book: This guideboo
Page 41 and 42: • Quality Control Forms specifica
Page 43 and 44: • Supplies to be used during trai
Page 45 and 46: Switching the Industry and Occupati
Page 47 and 48: Exhibit 4.1 2003 Newton Updates (co
Page 49 and 50: Exhibit 4.1 2003 Newton Updates (co
Page 51 and 52: Exhibit 4.2 2003 CAI Changes (conti
Page 53 and 54: Exhibit 4.2 2003 CAI Changes (conti
Page 55: Exhibit 4.2 2003 CAI Changes (conti
Page 58 and 59: All trainees were required to pass
Page 60 and 61: 5.2.3.2 Day 2 Day 2 included a gene
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Page 64 and 65: consisted of an FS Team Meeting in
Page 66 and 67: Table 5.2 Results from Home Study a
Page 68 and 69: Exhibit 5.1 Daily Trainee Evaluatio
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Exhibit 5.2 Mentoring Instructions
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Exhibit 5.2 Mentoring Instructions
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included in the Showcard Booklet fo
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usually attributed to breakoffs occ
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participation. Supervisors sometime
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6.8.2 Interviewing Staff Attrition
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Table 6.1 2003 NSDUH CAI Audit Trai
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Tables 7.18 and 7.19 present, in al
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Table 7.2 2003 Screening Results, b
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Table 7.4 2003 Screening Results, b
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Table 7.6 2003 Screening Results
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116 Table 7.8 2003 Screening Result
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Table 7.14 and 7.15 2003 Screening
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124 Table 7.14 and 7.15 2003 Screen
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Table 7.17 2003 Interview Results,
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152 Table 7.18 and 7.19 2003 Interv
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Table 7.20 and 7.21 2003 Interview
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320 Table 7.28 2003 Interview Resul
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321-A Table 7.29 2003 Interview Res
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Table 7.32 2003 English and Spanish
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Table 7.34 2003 Interviewer's Asses
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8. Quality Control While every step
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quality errors, and willingness to
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• Status and Result Code (record
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8.4.1 In-house Verification Verific
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Data Quality Team and the FS, RS, a
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Table 8.1 2003 NSDUH FI Exit Interv
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Exhibit 8.1 Steps to Maximize Data
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Exhibit 8.2 2003 NSDUH Field Interv
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Exhibit 8.2 2003 NSDUH Field Interv
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Exhibit 8.3. Field Interviewer Exit
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Exhibit 8.5 Overview of NSDUH Inter
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Exhibit 8.6 Quality Control Form (c
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Exhibit 8.8 Short FI Level Verifica
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Exhibit 8.9 Short FI Level Verifica
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Exhibit 8.10 Short FI Level Verific
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Appendix A New-to-Project Home Stud
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TO: FROM: SUBJECT: New-to-Project F
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Because of the importance we attach
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Appendix B New-to-Project Home Stud
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FI NAME: __________________________
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11. What is the Block Listing Map u
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24. It is possible for the HU scree
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Questions 38-40: Described below ar
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2003 National Survey on Drug Use an
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16. If the screen on your Newton ha
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Appendix C Veteran Home Study Cover
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DATE: December 4, 2002 TO: FROM: 20
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The 2003 Veteran Training Conferenc
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Items You Must Bring to Training 20
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Appendix D Veteran Home Study Exerc
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2003 NSDUH Veteran Training Confere
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Q9. Which of the following is NOT t
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Q24. There is no wrong answer to th
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Appendix E Verification Scripts
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Verification Script for Code 70 Gen
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Screening Script: >UNDR18AA< In rec
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We would like to ask this teen a fe
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A1B< >A1C< >A2A< >A2AELB1< Were you
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A4< Did you complete a short set of
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ELB1A< >MPAY< >MPAY2< Would you ple
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Verification Script for Code 30 Gen
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B1A< >B1AELB1< >B1B< >B1C< How were
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B2< According to our interviewer, t
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Screening Information Provided for
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NORES2C< >SPEAKCC1AC2ELB1< >IPRFC< >ELB1C< >DONE
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Screening Script: >INTRO1D< May I s
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SPEAKD2< May I speak with this pers
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D1_13B< >D1_13C< >D1_18A< >D1_18B<
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D1_26D< >D1_26E< >D1_26F< >D2< (Wil
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Appendix F Census Bureau Industry a
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Industry and Occupation Coding Over
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Table F.2 2003 NSDUH Industry and O
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