Genetic and environmental contributions to depression in Sri Lanka

Ball, Harriet A.; Sumathipala, Athula; Siribaddana, Sisira H.; Kovas, Yulia; Glozier, Nick; McGuffin, Peter and Hotopf, Matthew. 2009. Genetic and environmental contributions to depression in Sri Lanka. The British Journal of Psychiatry, 195(6), pp. 504-509. ISSN 0007-1250 [Article]

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Abstract or Description

Susceptibility to depression results from genetic and non-familially shared environmental influences in high-income, Western countries. Environments may play a different role for populations in different contexts.

To examine heritability of depression in the first large, population-based twin study in a low-income country.

Lifetime depression and a broader measure of depression susceptibility (D-probe) were assessed in 3908 adult twins in Sri Lanka (the CoTASS study).

There were gender differences for the broad definition (D-probe), with a higher genetic contribution in females (61%) than males (4%). Results were similar for depression, but the prevalence was too low to estimate heritability for males.

Genetic influences on depression in women appear to be at least as strong in this Sri Lankan sample as in higher-income countries. Conclusions are less clear for men but suggest a larger role for environments rather than genes. The nature as well as the magnitude of environmental influences may also differ across populations.

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December 2009Published

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23 Mar 2011 12:11

Last Modified:

04 Jul 2017 09:25

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Yes, this version has been peer-reviewed.


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