EXP Nº 10275-2006-PHC/TC-LIMA RICARDO ENRIQUE VARGAS CAYO

6.4.1 Informed Consent and Getting Started

Once the selected individual(s) was identified during screening, the FI asked to complete the interview(s) during that visit. If this was not convenient for the respondent, the FI entered information about possible times for future contacts in the iPAQ ROC. A minimum of four visits was made at different times of day on different days of the week in an attempt to complete the interview.

Once a State reached the contractual weighted overall response rate target for the year (65 percent), achieved an 80 percent unweighted interview response rate, and completed the

minimum cumulative number of interviews, interview cases that had received at least four callback attempts were eligible for finalization with no additional fieldwork. Before finalizing a case, FSs reviewed the ROC of pending interviews to ensure each case had been given ample opportunity to be completed. If feasible and cost-effective, additional callbacks were made to SDUs that were not visited at different times on certain days. If the interview was not completed during these additional contacts, then the FI assigned a final code.

For adults selected for the NSDUH interview, the FI read the Introduction and Informed Consent for Interview Respondents Age 18+ script from the Showcard Booklet to introduce the study, describe the interview process and procedures to be followed, and detail the number of people each respondent represented. Along with reading the Informed Consent script, the Study Description was also provided to meet the Informed Consent requirements for the interview. After receiving consent, the FI began the interview in a private location.

If the selected individual was aged 12 to 17, the FI was responsible for obtaining verbal consent from a parent or guardian before contacting the youth. The only exceptions to this rule were in certain group quarters situations, like dormitories, and other SDUs where consent was unobtainable because a youth was living independently without a parent or guardian residing in the home. Beginning in October 2012, this exception only applied to 17-year-olds living

independently. For all youths aged 16 years or younger, parental permission was required with no exceptions.

permission was granted, the FI approached the youth and read the Introduction and Informed Consent script to introduce the study, describe the interview process and procedures to be followed, and detail the number of youths each respondent represented. The FI also provided a copy of the Study Description to fulfill all required aspects of Informed Consent. After obtaining the youth's agreement to participate, parents were then asked to leave the interview setting to ensure the confidentiality of the youth's responses and the FI began the interview.

6.4.2 Computer-Assisted Interviews

The NSDUH interview began in the computer-assisted personal interviewing (CAPI) mode, with the FI reading the questions from the computer screen and entering the respondent's replies into the computer. After completing the Reference Date Calendar, the FI explained to the respondent how to use the computer for the audio computer-assisted self-interviewing (ACASI) sections. Utilizing ACASI methodology for the sensitive substance use and nonuse questions enhanced privacy since the respondent listened to the prerecorded questions through the headphones and entered their responses directly into the computer. Beginning with a practice session, which introduced the various computer keys used during the interview, the respondent then proceeded through the interview. Four times during the ACASI portion of the interview, the respondent was instructed to ask the FI for a specific picture pill card designed to aid respondent recall. When the respondent was finished with the ACASI portion, the FI once again took charge of the computer, asking additional demographic questions as well as health care, insurance, and income questions. During both the beginning and ending CAPI portions, showcards were utilized to assist respondents in answering the questions.

The average computer-assisted interviewing (CAI) administration times are provided in

Tables 6.1 through 6.35 at the end of this chapter for the overall survey and for the various sections of the NSDUH interview by respondent age (youths aged 12 to 17 or adults aged 18 or older) and survey year (2010, 2011, and 2012). These timing tables were calculated using audit trail data, which records responses and the time spent on each item. Cases with extreme values for the overall time (less than 30 minutes or more than 240 minutes) are excluded from the tables.

Please note that the total number of interviews included varies between tables due to interview skip patterns and excluded and missing timing data. Also note that variations in the questionnaire content between the survey years (e.g., questions added or deleted) may affect the comparability of some timing statistics.

6.4.3 End of Interview Procedures

After the last interview question, the interview process involved several final steps. FIs had to:

• prepare the Quality Control Form and ask the respondent to complete the remaining items on the form;

• have the respondent seal the completed Quality Control Form in a postage-paid envelope addressed to RTI;

• prepare the Interview Payment Receipt, giving the appropriate copy to the respondent;

• provide the adult respondent or parent or guardian of a youth respondent with a Question and Answer Brochure if not provided earlier;

• complete the FI Observation Questions; • enter the final result code in the iPAQ;

• gather all interview equipment and materials; and • thank the respondent.

Each week, FIs sent all completed Reference Date Calendars and Interview Payment Receipts to his or her FS. FIs mailed sealed Quality Control Form envelopes to RTI within 24 hours of completing the interview. Each night FIs transmitted interview data to RTI.