All posts by Ally Avery

Reassessing relationships between appetite and adiposity in people at risk of obesity: a twin study using fMRI

Sewaybricker LE, Melhorn SJ, Rosenbaum JL, Askren MK, Tyagi V, Webb MF, De Leon MRB, Grabowski TJ, Schur EA

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Differences in Stress and Anxiety Among Women With and Without Children in the Household During the Early Months of the COVID-19 Pandemic.

Avery AR, Tsang S, Seto EYW, Duncan GE

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Educational attainment of same-sex and opposite-sex dizygotic twins: An individual-level pooled study of 19 twin cohorts

Silventoinen K, Bogl LH, Jelenkovic A, et al.

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GPS-based built environment measures associated with adult
physical activity

Boakye KA, Amram O, Schuna JM, Duncan GE, Hystad P.

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Genetic and environmental influences on posttraumatic stress disorder symptoms and disinhibited eating behaviors

Afari N, Gasperi M, Dochat C, Wooldridge JS, Herbert MS, Schur EA, Buchwald DS.

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COVID-19 Follow-up: Change in Physical Activity

In our March baseline survey, we asked participants their perceived change in the amount of physical activity since the widespread social restriction soon after the World Health Organization declared the COVID-19 a pandemic. At the time, 43.78% of the participants reported a decrease in physical activity, 29.84% reported no change, and 26.38% reported an increase in the amount of physical activity, compared to prior to the spread of COVID-19.

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Association Between Low Back Pain and Body Mass Index in Adult Twins: An analysis of monozygotic and dizygotic twins of the Washington State Twin Registry

Liechty A, Tsang S, Turkheimer E, Duncan GE.

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Central and Peripheral Symptoms in Network Analysis are Differentially Heritable A Twin Study of Anxious Misery

Olatunji BO, Christian C, Strachan E, Levinson CA.

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Perceived change in physical activity and mental health during COVID-19: Findings among adult twin pairs

Between March 27 and April 5, 2020, we administered an online survey asking participants a series of questions regarding the changes of health-related behaviors and health outcomes during the early days of the COVID-19 pandemic in the US. Considering that strategies aimed to mitigate the COVID-19 pandemic, such as physical distancing and lock downs, may have unintended consequences on health behaviors (e.g., physical activity, exercise), we explored the relation between individuals’ perceived change in the amount of physical activity and mental health over the short-term.

Continue reading Perceived change in physical activity and mental health during COVID-19: Findings among adult twin pairs

Perceived change in physical activity levels and mental health during COVID-19: Findings among adult twin pairs

Duncan GE, Avery AR, Seto E, Tsang S

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Genetic and environmental variation in educational attainment: an individual-based analysis of 28 twin cohorts

Silventoinen K, Jelenkovic A, Sund R, et al.

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Affectionate Communication findings

We are happy to share that a manuscript using data from the affectionate communication study has been published. Within twin pairs, identical twins were more highly correlated for expressed and received affection than fraternal twins, suggesting genetic influences play a role in affection. Using an ACE model, which is used in twin studies to estimate the contribution of genetics and the environment to a given phenotype such as affection, the study authors determined that 45% of the variance in expressed affectionate communication is heritable (due to genetics), and 0% is explained by the common environment. This means that shared influences such as being raised by the same parents in the same households had no impact on expressed affection. Only 21% of the variance in received affection was heritable. Given that received affection largely depends on others, it is not surprising to see that heritability is lower for this trait. These findings suggest that greater attention should be given to communicative behaviors by considering genetic and biological influences, and not just environmental influences.

If you would like to read the full article, click here.