The sexual identity question is asked in both face-to-face and telephone interviews, at first personal contact. During the face-to-face interviews, adults were asked; "Which of the options on this show card best describes how you think of yourself?" For telephone interviews, a slightly different way of collecting the information was used: "I will now read out a list of terms people sometimes use to describe how they think of themselves". The list is read out to respondents twice. On the second reading, the respondent has to say "stop" when an appropriate term they identified with is read out. In both modes, the order in which the terms appeared, or are read out, is unique for each household’s respondent to ensure confidentiality.