Browse the English in-person questionnaire for the 2020 National Survey on Drug Use and Health (NSDUH), as administered in Quarter 4 of 2020. The document provides the exact questions given to respondents in their full context, along with the skip patterns that determined whether a person was asked a question or not. There is also information on which sections were interviewer administered when conducted in-person, and a section that summarizes changes made to the questionnaire for 2020.