Category Archives: Enrollment Survey

The Enrollment Survey is completed by all twin pairs to enroll in the Washington State Twin Registry. Twins are asked to provide their cotwin’s contact information on the survey. This allows us to invite their cotwin to participate as well. The survey provides researchers with basic health information which they can use to publish papers, apply for grants, and recruit for studies.

The survey has evolved over the years. New questions that may be of interest to researchers have been added. Questions which do not provide researchers with the best information have been changed or removed. For example, the first Enrollment Survey, which was sent out from 2002-2007, included a question about race that only allowed respondents to choose one answer and included Hispanic/Latino as a race option. This question was updated in 2007 to reflect current NIH & US Census guidelines for reporting race and ethnicity. It now allows respondents to choose more than one answer and to report ethnicity (Hispanic/Latino) separately.

Quasi-causal associations of physical activity and neighborhood walkability with body mass index: A twin study.

Sleep duration and depressive symptoms: a gene-environment interaction.

Sleep duration and body mass index in twins: a gene-environment interaction.

Genetic and environmental influences on residential location in the US.

The comorbidity of self-reported chronic fatigue syndrome, post-traumatic stress disorder, and traumatic symptoms.

Temporomandibular disorder-type pain and migraine headache in women: a preliminary twin study.

Depression and obesity: Do shared genes explain the relationship?

Chronic pain, overweight, and obesity: Findings from a community-based twin registry.

A twin study of depression and migraine: Evidence for a shared genetic vulnerability.

Are post-traumatic stress disorder symptoms and temporomandibular pain associated? Findings from a community-based twin registry.

Unique environmental effects on physical activity participation: a twin study.

Twin analyses of fatigue.

Feeling bad in more ways than one: comorbidity patterns of medically unexplained and psychiatric conditions.

University of Washington Twin Registry: construction and characteristics of a community-based twin registry.

A twin study of posttraumatic stress disorder symptoms and chronic widespread pain.

Is the association between posttraumatic stress disorder symptoms and poor health due to a common familial or genetic factor?

Genetic and environmental influences on insomnia, daytime sleepiness, and obesity in twins.

Genetic pleiotropy between asthma and obesity in a community-based sample of twins.