epidemiological در اینجا به چه معنی است؟

Question

 Spasojevic and Alloy chose the risk factors that represent well three different theoretical approaches to studying depression: cognitive (negative cognitive styles and self-criticism),interpersonal (dependency and neediness), and epidemiological (history of past depression). Each of these variables has received empirical support as risk factors for depression (for a brief review, see Spasojevic & Alloy, 2001).

Answer 1

شاید به معنی "سرایت شناسی" (در مورد افسردگی باشد).

Answer 2

شاید به معنی "سابقه افسردگی" باشد.