The South Korean Twin Registry

Hur, Yoon‐Mi; Shin, Joong Sik; Jeong, Hoe-Uk; Han, Jung Yeol

doi:10.1375/183242706779462606

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…The MZ to DZ ratio in our sample was 1.39, consistent with that found in most Asian twin samples (Ando et al, 2006;Hur et al, 2006). The mean age of the T1 sample at the time of the assessment was 13.52 (SD = 2.67) years.…”

Section: Sample Descriptionsupporting

confidence: 88%

“…Over the past few decades, a number of welldesigned twin studies have been conducted on child and adolescent psychopathology (see Table 1), mainly in the United States and Europe (Bartels et al, 2007;Eaves et al, 1997;Hewitt et al, 1997;Iacono et al, 2006;Kaprio, 2006;Lemery-Chalfant et al, 2006;Lichtenstein et al, 2007;Neiderhiser et al, 2007;Trouton et al, 2002;van den Bree et al, 2007), with a few studies in Asia and Australia (Ando et al, 2006;Bennett et al, 2006;Huang et al, 2009;Hur Kuo et al, 2006). These studies have contributed significantly to the field by disentangling the intertwined roles of genetic and environmental factors in complex human traits, as well as by providing new information about the complex interplay between genes and the environment.…”

mentioning

confidence: 99%

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The Beijing Twin Study (BeTwiSt): A Longitudinal Study of Child and Adolescent Development

Chen

Zhang

et al. 2012

Twin Res Hum Genet

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Rates of emotional and behavioral problems among children and adolescents in China are increasing and represent a major public health concern. To investigate the etiology of such problems, including the effects and interplay of genes and environment, the Beijing Twin Study (BeTwiSt) was established. A representative sample of adolescent twins in Beijing (N = 1,387 pairs of adolescent twins, mostly between the ages of 10 and 18 years) was recruited and assessed longitudinally. Data collection included the following: emotional and behavioral problems (e.g., depressive symptoms, anxiety, delinquency, drinking, and smoking); family, peer, and school environments; stress; social and academic competence; cognitive traits (e.g., emotion suppression, rumination, and effortful control); and saliva samples for DNA genotyping and sequencing. The combination of quantitative and molecular genetic approaches and the timeliness of the project, with the sample residing in a region with a rapidly changing economic and cultural climate, are particular strengths of this study. Findings from this study are expected to help understanding of the etiological mechanisms underlying child and adolescent normal and abnormal development in regions undergoing substantial social, cultural, and economic changes.

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Section: Sample Descriptionsupporting

confidence: 88%

mentioning

confidence: 99%

The Beijing Twin Study (BeTwiSt): A Longitudinal Study of Child and Adolescent Development

Chen

Zhang

et al. 2012

Twin Res Hum Genet

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“…The posterior probability of being MZ for same-sex twins with the same genotype in all nine loci was estimated to be 99.99%. The proportion of same-sex DZ twins in BeTwiSt was smaller than that of Western samples, but similar to other Asian twin samples (Hur, Shin, Jeong, & Han, 2006). The age of participants ranged from 10 to 18 years (M ¼ 13.57, SD ¼ 2.67), and 52% were females.…”

Section: Methods Participantssupporting

confidence: 67%

Investigating Unique Environmental Influences of Parenting Practices on Youth Anxiety

Chen

Zhang

2016

International Journal of Behavioral Development

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The associations between parenting practices and adolescent anxiety symptoms were examined in both individual and monozygotic (MZ) twin differences levels. Participants were 804 pairs of Chinese MZ adolescent twins aged 10-18 years (M ¼ 13.57, SD ¼ 2.67, 52% females). Twins' anxiety symptoms were assessed by self-and parent-reports. Twins also reported their perceived parenting practices. On the individual level, parental warmth-reasoning was negatively, whereas harshness-hostility was positively, associated with both self-and parent-reported youth anxiety. On the MZ-twin differences level, the magnitudes of the associations between parenting practices and youth anxiety were decreased. MZ-twin difference in parental warmth-reasoning remained significantly associated with self-and parent-reported youth anxiety; MZ-twin difference in parental harsh-hostility was only significantly associated with self-reported youth anxiety. This study indicated that parental warmth-reasoning and harshness-hostility may be unique environmental experiences that influence youth anxiety, and illustrated the necessity of controlling for gene-environment correlations when examining the true environmental effects of parenting on child behavior.

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“…The South Korean twins were drawn from the South Korean Twin Registry (SKTR) 26. The SKTR is a nationwide volunteer twin registry that includes twins from infants to young adults.…”

Section: Methodsmentioning

confidence: 99%

Genetic influences on the difference in variability of height, weight and body mass index between Caucasian and East Asian adolescent twins

et al. 2008

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Objective: Twin studies are useful for investigating the causes of trait variation between as well as within a population. The goals of the present study were two-fold: First, we aimed to compare the total phenotypic, genetic and environmental variances of height, weight and BMI between Caucasians and East Asians using twins. Secondly, we intended to estimate the extent to which genetic and environmental factors contribute to differences in variability of height, weight and BMI between Caucasians and East Asians. Design: Height and weight data from 3735 Caucasian and 1584 East Asian twin pairs (age: 13-15 years) from Australia, China, Finland, Japan, the Netherlands, South Korea, Taiwan and the United States were used for analyses. Maximum likelihood twin correlations and variance components model-fitting analyses were conducted to fulfill the goals of the present study. Results: The absolute genetic variances for height, weight and BMI were consistently greater in Caucasians than in East Asians with corresponding differences in total variances for all three body measures. In all 80 to 100% of the differences in total variances of height, weight and BMI between the two population groups were associated with genetic differences. Conclusion: Height, weight and BMI were more variable in Caucasian than in East Asian adolescents. Genetic variances for these three body measures were also larger in Caucasians than in East Asians. Variance components model-fitting analyses indicated that genetic factors contributed to the difference in variability of height, weight and BMI between the two population groups. Association studies for these body measures should take account of our findings of differences in genetic variances between the two population groups.

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The South Korean Twin Registry

Cited by 4 publications

References 17 publications

The Beijing Twin Study (BeTwiSt): A Longitudinal Study of Child and Adolescent Development

The Beijing Twin Study (BeTwiSt): A Longitudinal Study of Child and Adolescent Development

Investigating Unique Environmental Influences of Parenting Practices on Youth Anxiety

Genetic influences on the difference in variability of height, weight and body mass index between Caucasian and East Asian adolescent twins

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