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Chunk #3 — METHOD — Measures — Self-Harm

Source
Early onset alcohol use and self-harm: a discordant twin analysis.
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yes

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The two self-harm variables were also dichotomously coded as 0 (“No) or 1 (“Yes”). For SA, participants responded to the question, “Have you ever tried to take your own life?” This question was asked of all participants, not just those who reported depressed mood or suicidal thoughts. Following a positive endorsement of SA, age of onset for the first occurrence was also assessed. In order to maximize the ability to make causal inferences regarding the association between EAU and self-harm, participants were excluded if they reported an age of SA onset prior to the age of onset of alcohol use. This resulted in 49 individuals being excluded for SA analyses. For NSSI, participants were asked, “(Other than when you tried to take your own life), have you ever hurt yourself on purpose, for example, by cutting or burning yourself?” Age of onset was not assessed for NSSI. For participants endorsing SA or NSSI, additional questions were asked including the method used in the most serious SA (e.g., medication ingestion, hanging, etc.) as well as the individual’s emotional/behavioral state prior to