Chunk #10 — 2. Methods — 2.4. Measuring adult depression

Source

Serotonin transporter gene moderates childhood maltreatment's effects on persistent but not single-episode depression: replications and implications for resolving inconsistent results.

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persistence hypothesis. Time 1 depression was a diagnosis of past-year MDD at the first assessment (age 18 in Dunedin and mean age 33 in E-Risk). Time 2 depression was past-year MDD at the second assessment (age 21 in Dunedin and mean age 35 in E-Risk). Time 3 depression was past-year MDD at the third assessment (age 26 in Dunedin and mean age 38 in E-Risk). Time 4 depression was past-year MDD at the fourth assessment (age 32 in Dunedin and mean age 40 in E-Risk).