Chunk #5 — 2. Method — 2.1. Sample

Source

Comorbidity of posttraumatic stress disorder with alcohol dependence among US adults: results from National Epidemiological Survey on Alcohol and Related Conditions.

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In our study, participants who meet a diagnosis of lifetime PTSD (without AD; n = 2463), lifetime AD (without PTSD; n = 4914) or both were included. Those who meet both lifetime PTSD and lifetime AD compose the PTSD-AD comorbidity group (n = 597).