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Table 1 Definition of key variables

From: Methods to increase reporting of childhood sexual abuse in surveys: the sensitivity and specificity of face-to-face interviews versus a sealed envelope method in Ugandan primary school children

Variable Items Coding
Self-reported disability Do you have difficulty seeing, even if wearing glasses? Do you have difficulty hearing, even if using a hearing aid? Do you have difficulty walking or climbing steps? Do you have difficulty remembering or concentrating? Do you have difficulty with self-care, such as washing all over or dressing? Using your usual language, do you have difficulty communicating, for example understanding, or being understood? Response options: No difficulty, Some difficulty, A lot of difficulty, Cannot do this at all. Coded 1 if answered with ‘some difficulty’; 2 if answered with ‘a lot of difficulty’ or ‘cannot do’; 0 if answered no or n/a to all items.
Reported experience of other forms of sexual violence Has a teacher or other adult that works at your school ever done any of the following things to you: Teased you or made sexual comments about your breasts, genitals, buttocks or other body parts? Touched your body in a sexual way or in a way that made you uncomfortable? By “sexual way” we mean touching you on your genitals, breasts or buttocks. Showed you pictures, magazines, or movies of people or children doing sexual things? Made you take your clothes off when it was not for a medical reason? Opened or took their own clothes off in front of you when they should not have done so? Kiss you when you didn’t want to be kissed? Make you touch their genitals, breasts or buttocks when you didn’t want to? Touch your genitals, breasts or buttocks when you didn’t want them to? Give you money/things to do sexual things? Involve you in making sexual pictures or videos? Threaten or pressure you to have sex or do sexual things with them? Has anyone besides a school staff member ever: Disturbed or bothered you by making sexual comments about you? Kissed you, when you did not want them to? Touched your genitals or breasts when you did not want them to, or in a way that made you uncomfortable? Threaten or pressure you to make you do something sexual with them? (Does not include forced sex) Coded 1 if answered yes to any of the items; 0 if answered no or n/a to all items.
Any experience of forced sex Has a teacher or other adult that works at your school ever done any of the following things to you: Actually make you have sex with them by threatening or pressuring you, or by making you afraid of what they might do? Make you have sex with them by physically forcing you (have sex with you)? Has anyone besides a school staff member ever: Make you have sex with them, because they threatened or pressured you? Had sex with you, by physically forcing you? Thinking about the person you had/have your first relationship with: Did you ever have sex with them when you did not want to, because you were afraid of what they might do? Did that partner ever force you to have sex with them when you did not want to? Coded 1 if answered yes to any of the items; 0 if answered no or n/a to all items.
True Positive Respondents Disclosed experience of forced sex in both the FTFI and the SEM Coded 1 if answered yes to ‘Any experience of forced sex’ and yes to the SEM question; 0 if did not answer yes to both
False Positive Respondents Disclosed experience of forced sex in the FTFI but not the SEM Coded 1 if answered yes ‘to Any experience of forced sex’ and no to the SEM question; 0 if did not answer in this pattern
False Negative Respondents Disclosed experience of forced sex in the SEM but not in the FTFI Coded 1 if answered no to ‘Any experience of forced sex’ and yes to SEM question; 0 if did not answer in this pattern
True Negative Respondents Did not disclose experience of forced sex in either method. Coded 1 if answered no to ‘Any experience of forced sex’ and no to the SEM question; 0 if did not answer in this pattern