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Psychiatric resilience: longitudinal twin study

  • Ananda B. Amstadter (a1), John M. Myers (a1) and Kenneth S. Kendler (a2)
Abstract
Background

The source of variability in people's response to stressful life events is poorly understood.

Aims

We examine the genetic and environmental underpinning of resilience (i.e. the difference between the twins' internalising symptoms and their predicted symptoms based on cumulative stressful life events).

Method

Stressful life event exposure and internalising symptoms were assessed at two time points in 7500 adult twins. Using the residual between actual and predicted internalising symptom total score, twin modelling was conducted for each wave separately and longitudinally.

Results

Resilience was found to have a moderate genetic heritability at each wave (~31%). Qualitative gender effects were found. Incorporating error of measurement into the model increased the estimated heritability for the latent construct of resilience (~50%). When measurement error and occasion-specific effects were removed, environmental influences contributed roughly equally to level of resilience.

Conclusions

Both genes and environment influence level of psychiatric resilience, and are largely stable over time. Environmental influences can have an enduring effect on resilience.

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Copyright
Corresponding author
Ananda B. Amstadter, PhD, Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Department of Psychiatry, 800 E. Leigh Street, PO Box 980126, Richmond, VA 23298-0126. Email: abamstadter@vcu.edu
Footnotes
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See invited commentary, pp. 281–282, this issue.

This work was supported in part by NIH grants R01 AA020179, P20 AA107828 and R37 AA011408. The Mid-Atlantic Twin Registry is supported by NIH grant UL1RR031990.

Declaration of interest

None.

Footnotes
References
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  • ISSN: 0007-1250
  • EISSN: 1472-1465
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Psychiatric resilience: longitudinal twin study

  • Ananda B. Amstadter (a1), John M. Myers (a1) and Kenneth S. Kendler (a2)
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