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Chunk #6 — Methods — Sample

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Trauma exposure, posttraumatic stress disorder and risk for alcohol, nicotine, and marijuana dependence in Israel.
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The present analysis included 1,317 participants with complete responses to all relevant interview items. Of these, 76.4% were male; 24.4% were 21–29 years old, 34.6% were 30–44, and 41.0% were 45 or older; and 34.8% were immigrants. Monthly income was dichotomized by less than or equal to 10,000 NIS (New Israeli Shekel), ~$2,300 in 2007), close to the average monthly household income in Israel (31), with 55.2% in the “lower” income category.