Cited by 794Genetic Associations and EpidemiologyNeurotransmitter Receptor Influence on BehaviorBipolar Disorder and Treatment

A Swedish National Twin Study of Lifetime Major Depression

Kendler, Kenneth S., Gatz, Margaret, Gardner, Charles O., Pedersen, Nancy L.·2006·American Journal of Psychiatry

Abstract

OBJECTIVE: Substantial evidence supports the heritability of lifetime major depression. Less clear is whether genetic influences in major depression are more important in women than in men and whether genetic risk factors are the same in the two sexes. It is not known whether genetic effects on major depression are constant across historical cohorts. METHOD: Lifetime major depression was assessed at personal interview by modified DSM-IV criteria in 42,161 twins, including 15,493 complete pairs, from the national Swedish Twin Registry. Twin models were evaluated by using the program Mx. RESULTS: Model fitting indicated that the heritability of liability to major depression was significantly higher in women (42%) than men (29%) and the genetic risk factors for major depression were moderately correlated in men and women. No significant differences were seen in the etiologic roles of genetic and environmental factors in major depression in three cohorts spanning birth years 1900-1958. CONCLUSIONS: In the largest sample to date, lifetime major depression was moderately heritable, with estimates similar to those in prior studies. In accord with some but not other previous investigations, this study suggests both that the heritability of major depression is higher in women than in men and that some genetic risk factors for major depression are sex-specific in their effect. No evidence was found for differences in the roles of genetic and environmental risk factors in major depression in birth cohorts spanning nearly six decades.

Integrity signals

Registry

Crossref · 10.1176/appi.ajp.163.1.109

Cites

38 of 38 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Genetic factors partially mediate the risk for major depressive disorder.

    “It is well established that the risk for MDD is partially mediated by genetic factors.”

    From Epigenetics and depression (2019) · cites this paper as [4]

  • The risk for major depression is both genetically and environmentally determined.

    “The risk for major depression is both genetically and environmentally determined.”

    From Epigenetics and depression (2019) · cites this paper as [4]

  • A large Swedish twin study estimated the heritability of MDD to be approximately 37%, consistent with previous estimates.

    “A large twin study in a Swedish population estimated the heritability of MDD to be approximately 37%, which is consistent with estimates made in previous studies.”

    From Epigenetics and depression (2019) · cites this paper as [4]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Kendler, K. S., Gatz, M., Gardner, C. O., & Pedersen, N. L.
Affiliations
Virginia Commonwealth University (US)
Venue
American Journal of Psychiatry
Published
2006-01-01
Volume
163
Issue
1
Pages
109-114
ISSN
  • 0002-953X (ISSN-L)
  • 1535-7228
OpenAlex
W2159123213
Cited by
794
References
38
Citations by year
2026: 20 · 2025: 34 · 2024: 40 · 2023: 28 · 2022: 34 · 2021: 61 · 2020: 43 · 2019: 35 · 2018: 39 · 2017: 40 · 2016: 36 · 2015: 49 · 2014: 38 · 2013: 44 · 2012: 38
FWCI
22.78
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (AG 08724, R01AG008724)
  • National Institute of Mental Health (MH-49492, R01MH049492)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
Keywords
major depressive disorder, heritability, genetic risk factors, sex differences, environmental risk factors, lifetime depression, birth cohort, twin studies, Swedish Twin Registry
MeSH terms
Depressive Disorder, Major, Major Depressive Disorder, Diseases in Twins, Genetic Testing, Humans, Longitudinal Studies, Psychiatric Status Rating Scales, Registries, Risk Factors, Sex Factors, Social Environment, Sweden, Cohort Studies, Sex Distribution, Genetic Predisposition to Disease, Diagnostic and Statistical Manual of Mental Disorders

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review