journal
MENU ▼
Read by QxMD icon Read
search

Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies

journal
https://www.readbyqxmd.com/read/29125095/social-comparison-orientation-in-monozygotic-and-dizygotic-twins
#1
Pascal Huguet, Michèle Carlier, Conor V Dolan, Eco J de Geus, Dorret I Boomsma
Twin research has offered evidence that monozygotic (MZ) twins are more socially close than dizygotic (DZ) twins, but has not paid much attention to the way twins compare themselves with their co-twin. The few studies in this area suggest that 'horizontal comparisons' (social comparison motivated by solidarity or communion with others) matter more for MZ twins than for DZ twins, at least when the co-twin is the social comparison standard. Consistent with this view, we predicted higher interest in MZ twins relative to DZ twins to select their co-twin rather than other people in general as the social comparison standard...
November 10, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29110752/heritability-and-gwas-analyses-of-acne-in-australian-adolescent-twins
#2
Angela Mina-Vargas, Lucía Colodro-Conde, Katrina Grasby, Gu Zhu, Scott Gordon, Sarah E Medland, Nicholas G Martin
Acne vulgaris is a skin disease with a multifactorial and complex pathology. While several twin studies have estimated that acne has a heritability of up to 80%, the genomic elements responsible for the origin and pathology of acne are still undiscovered. Here we performed a twin-based structural equation model, using available data on acne severity for an Australian sample of 4,491 twins and their siblings aged from 10 to 24. This study extends by a factor of 3 an earlier analysis of the genetic factors of acne...
November 7, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29103407/musical-interests-and-talent-twin-jazz-musicians-and-twin-studies-twin-research-loss-of-a-preterm-multiple-conjoined-twin-conception-depression-in-fathers-of-twins-twin-to-twin-transfusion-syndrome-twin-news-high-achieving-twins-twin-children-of-a-tennis-star
#3
Nancy L Segal
Findings from twin studies of musical interests and talent are reviewed as a backdrop to the lives and careers of twin jazz musicians, Peter and Will Anderson. The Anderson twins exemplify many aspects of twin research, namely their matched musical abilities, shared musical interests, and common career. This overview is followed by reviews of studies and case reports of bereavement in families who have lost a preterm multiple birth infant, the conception of conjoined twins following in vitro fertilization (IVF), depression in fathers of twins, and twin-to-twin transfusion incidence in monochorionic-diamniotic IVF twin pairs...
November 6, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29103406/mathematical-ability-and-socio-economic-background-irt-modeling-to-estimate-genotype-by-environment-interaction
#4
Inga Schwabe, Dorret I Boomsma, Stéphanie M van den Berg
Genotype by environment interaction in behavioral traits may be assessed by estimating the proportion of variance that is explained by genetic and environmental influences conditional on a measured moderating variable, such as a known environmental exposure. Behavioral traits of interest are often measured by questionnaires and analyzed as sum scores on the items. However, statistical results on genotype by environment interaction based on sum scores can be biased due to the properties of a scale. This article presents a method that makes it possible to analyze the actually observed (phenotypic) item data rather than a sum score by simultaneously estimating the genetic model and an item response theory (IRT) model...
November 6, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29039294/a-comparison-of-heritability-estimates-by-classical-twin-modeling-and-based-on-genome-wide-genetic-relatedness-for-cardiac-conduction-traits
#5
Ilja M Nolte, Joeri A Jansweijer, Hariette Riese, Folkert W Asselbergs, Pim van der Harst, Timothy D Spector, Yigal M Pinto, Harold Snieder, Yalda Jamshidi
Twin studies have found that ~50% of variance in electrocardiogram (ECG) traits can be explained by genetic factors. However, genetic variants identified through genome-wide association studies explain less than 10% of the total trait variability. Some have argued that the equal environment assumption for the classical twin model might be invalid, resulting in inflated narrow-sense heritability (h 2) estimates, thus explaining part of the 'missing h 2'. Genomic relatedness restricted maximum likelihood (GREML) estimation overcomes this issue...
October 17, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29021003/seasonality-in-multiple-maternities
#6
Johan Fellman
In the 19th century, a series of international statistical congresses introduced common rules for the national demographic registers. This activity contributed to the genesis of statistical research. During the history of twin research, Hellin's law has played a central role because it is an approximately correct association between the rates of multiple maternities. However, it has been mathematically proven that Hellin's law cannot hold exactly. The majority of all studies of Hellin's law are based on empirical rates of multiple maternities...
October 12, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28978361/genetic-and-environmental-relationships-between-depressive-and-anxiety-symptoms-and-cardiovascular-risk-estimates-among-korean-twins-and-families
#7
Yun-Mi Song, Joohon Sung, Kayoung Lee
We aimed to assess shared genetic correlations of depressive and anxiety symptoms with concurrent and future estimated cardiovascular risk (CVR) score in Korean twins and family members. For the relationship with Adult Treatment Panel III CVR estimate in subjects aged 30-74 years (n = 1,059, baseline and follow-up after 3.2 ± 1.2 years), Center for Epidemiological Studies Depression Scale (CES-D) and state and trait anxiety inventory (SAI and TAI) were measured at baseline. A mixed linear model for CVR scores at baseline and follow-up was applied to include depressive and anxiety symptoms, twin and family effects, income, education, alcohol use, exercise, body mass index, and baseline CVR score for follow-up analysis...
October 5, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28868992/validity-of-self-reported-birth-weight-results-from-a-norwegian-twin-sample
#8
Thomas S Nilsen, Julia Kutschke, Ingunn Brandt, Jennifer R Harris
The association between birth weight and later life outcomes is of considerable interest in life-course epidemiology. Research often relies on self-reported measures of birth weight, and its validity is consequently of importance. We assessed agreement between self-reported birth weight and official birth records for Norwegian twins born 1967-1974. The intraclass correlation between self-reported birth weight and register-based birth weight was 0.91 in our final sample of 363 twins. It could be expected that 95% of self-reported birth-weight values will deviate from official records within a maximum of +446 grams and a minimum of -478 grams - around a mean deviation of 16 grams...
September 4, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975879/thg-volume-20-issue-5-cover-and-front-matter
#9
(no author information available yet)
No abstract text is available yet for this article.
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975878/thg-volume-20-issue-5-cover-and-back-matter
#10
(no author information available yet)
No abstract text is available yet for this article.
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975877/attitudes-to-gun-control-in-an-american-twin-sample-sex-differences-in-the-causes-of-variation
#11
Lindon J Eaves, Judy L Silberg
The genetic and social causes of individual differences in attitudes to gun control are estimated in a sample of senior male and female twin pairs in the United States. Genetic and environmental parameters were estimated by weighted least squares applied to polychoric correlations for monozygotic (MZ) and dizygotic (DZ) twins of both sexes. The analysis suggests twin similarity for attitudes to gun control in men is entirely genetic while that in women is purely social. Although the volunteer sample is small, the analysis illustrates how the well-tested concepts and methods of genetic epidemiology may be a fertile resource for deepening our scientific understanding of biological and social pathways that affect individual risk to gun violence...
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975876/twin-studies-in-brazil-projects-and-plans-twin-research-infant-twins-viewing-of-social-scenes-religiosity-and-substance-abuse-down-syndrome-among-twins-twin-case-of-chronic-periodontitis-in-the-news-the-twin-property-brothers-twins-with-cerebral-palsy-twins
#12
Nancy L Segal
Twin research in Brazil twin has expanded enormously in recent years, engaging the interests and efforts of many investigators, students and twins. Descriptions and brief summaries of this work and talks given by investigators at local conferences are presented, based on my four-city lecture tour. This is followed by summaries of twin research on infants' viewing of social scenes, religiosity and substance abuse, Down syndrome, and chronic periodontitis. This article concludes with twin-related news and information of general interest, including identical twin property designers, twins with cerebral palsy, twins affected with the Zika virus, a pair of twin writers, twins in sports, and a set of quadruplets from my childhood neighborhood in Riverdale, New York...
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975875/education-in-twins-and-their-parents-across-birth-cohorts-over-100-years-an-individual-level-pooled-analysis-of-42-twin-cohorts
#13
Karri Silventoinen, Aline Jelenkovic, Antti Latvala, Reijo Sund, Yoshie Yokoyama, Vilhelmina Ullemar, Catarina Almqvist, Catherine A Derom, Robert F Vlietinck, Ruth J F Loos, Christian Kandler, Chika Honda, Fujio Inui, Yoshinori Iwatani, Mikio Watanabe, Esther Rebato, Maria A Stazi, Corrado Fagnani, Sonia Brescianini, Yoon-Mi Hur, Hoe-Uk Jeong, Tessa L Cutler, John L Hopper, Andreas Busjahn, Kimberly J Saudino, Fuling Ji, Feng Ning, Zengchang Pang, Richard J Rose, Markku Koskenvuo, Kauko Heikkilä, Wendy Cozen, Amie E Hwang, Thomas M Mack, Sisira H Siribaddana, Matthew Hotopf, Athula Sumathipala, Fruhling Rijsdijk, Joohon Sung, Jina Kim, Jooyeon Lee, Sooji Lee, Tracy L Nelson, Keith E Whitfield, Qihua Tan, Dongfeng Zhang, Clare H Llewellyn, Abigail Fisher, S Alexandra Burt, Kelly L Klump, Ariel Knafo-Noam, David Mankuta, Lior Abramson, Sarah E Medland, Nicholas G Martin, Grant W Montgomery, Patrik K E Magnusson, Nancy L Pedersen, Anna K Dahl Aslan, Robin P Corley, Brooke M Huibregtse, Sevgi Y Öncel, Fazil Aliev, Robert F Krueger, Matt McGue, Shandell Pahlen, Gonneke Willemsen, Meike Bartels, Catharina E M van Beijsterveldt, Judy L Silberg, Lindon J Eaves, Hermine H Maes, Jennifer R Harris, Ingunn Brandt, Thomas S Nilsen, Finn Rasmussen, Per Tynelius, Laura A Baker, Catherine Tuvblad, Juan R Ordoñana, Juan F Sánchez-Romera, Lucia Colodro-Conde, Margaret Gatz, David A Butler, Paul Lichtenstein, Jack H Goldberg, K Paige Harden, Elliot M Tucker-Drob, Glen E Duncan, Dedra Buchwald, Adam D Tarnoki, David L Tarnoki, Carol E Franz, William S Kremen, Michael J Lyons, José A Maia, Duarte L Freitas, Eric Turkheimer, Thorkild I A Sørensen, Dorret I Boomsma, Jaakko Kaprio
Whether monozygotic (MZ) and dizygotic (DZ) twins differ from each other in a variety of phenotypes is important for genetic twin modeling and for inferences made from twin studies in general. We analyzed whether there were differences in individual, maternal and paternal education between MZ and DZ twins in a large pooled dataset. Information was gathered on individual education for 218,362 adult twins from 27 twin cohorts (53% females; 39% MZ twins), and on maternal and paternal education for 147,315 and 143,056 twins respectively, from 28 twin cohorts (52% females; 38% MZ twins)...
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975874/abstracts-for-the-41st-human-genetics-society-of-australasia-annual-scientific-meeting-brisbane-queensland-august-5-8-2017
#14
(no author information available yet)
No abstract text is available yet for this article.
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975873/associations-between-asthma-and-sensitization-to-pet-or-pollen-allergens-in-young-swedish-twins-the-stoppa-study
#15
Cecilia Lindemalm, Björn Nordlund, Anne K Örtqvist, Cecilia Lundholm, Marianne van Hage, Tong Gong, Catarina Almqvist
BACKGROUND: An association between childhood asthma and IgE sensitization has been established, but our understanding of the genetic and environmental contribution to it is incomplete. Our aim was to estimate the associations and dose-response relationship between asthma and sensitization to airborne allergens in Swedish 9- to 14-year-old twins. Additionally, we aimed to explore the importance of familial confounding from shared genes and environment using co-twin controls. METHODS: In the STOPPA cohort, 752 same-sex twin children were screened with Phadiatop® (Thermo Fisher Scientific; Pharmacia, Uppsala, Sweden); if positive further analysis of IgE antibodies to airborne allergens of pets (cat, horse, dog), pollens (birch, timothy, mugwort), mites, and mold were performed...
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28975872/abstracts-for-the-41st-human-genetics-society-of-australasia-annual-scientific-meeting-brisbane-queensland-august-5-8-2017
#16
(no author information available yet)
No abstract text is available yet for this article.
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28828998/establishment-of-the-avera-twin-register-in-the-midwest-usa
#17
Julie Kittelsrud, Erik A Ehli, Vikki Petersen, Tammy Jung, Gonneke Willemsen, Dorret Boomsma, Gareth E Davies
The Avera Twin Register (ATR) aims to study environmental and genetic influences on health and disease using a longitudinal repository of biological specimens, survey data, and health information provided by multiples and their family members. The ATR is located in Sioux Falls, South Dakota, which is a rural and frontier area in the Midwestern United States with a density of four people per square kilometer. The target area of the ATR is South Dakota and the four surrounding states: Minnesota, Iowa, North Dakota, and Nebraska...
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28803575/placental-expressions-of-cdkn1c-and-kcnq1ot1-in-monozygotic-twins-with-selective-intrauterine-growth-restriction
#18
Chenyu Gou, Xiangzhen Liu, Xiaomei Shi, Hanjing Chai, Zhi-Ming He, Xuan Huang, Qun Fang
CDKN1C and KCNQ1OT1 are imprinted genes that might be potential regulators of placental development. This study investigated placental expressions of CDKN1C and KCNQ1OT1 in monozygotic twins with and without selective intrauterine growth restriction (sIUGR). Seventeen sIUGR and fifteen normal monozygotic(MZ) twin pairs were examined. Placental mRNA expressions of CDKN1C and KCNQ1OT1 were detected by real-time fluorescent quantitative PCR. CDKN1C protein expression was detected by immunohistochemical assay and Western-blotting...
October 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28829001/iron-supplementation-in-twin-pregnancy-the-benefit-of-doubling-the-iron-dose-in-iron-deficient-pregnant-women-a-randomized-controlled-trial
#19
Shiri Shinar, Avital Skornick-Rapaport, Sharon Maslovitz
OBJECTIVE: To assess the efficacy of doubling the daily dose of iron supplement in iron-deficient women with twin pregnancies. STUDY DESIGN: Using a prospective randomized controlled trial, iron-deficient women with twin gestations were randomized to receive a single or a double dose of daily iron from 16 weeks of gestation until 6 weeks postpartum. The primary outcome was hemoglobin at 32 weeks. Secondary outcomes included ferritin at 32 weeks, hemoglobin during pregnancy and postpartum, birth weights, preterm birth rate, gastrointestinal side effects, intravenous iron administration, and compliance with treatment...
August 22, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28803591/genetic-and-environmental-influences-on-correlations-between-hearing-and-cognitive-functions-in-middle-and-older-chinese-twins
#20
Chunsheng Xu, Dongfeng Zhang, Xiaocao Tian, Haiping Duan, Yili Wu, Zengchang Pang, Shuxia Li, Qihua Tan
The genetic and environmental impacts on correlations between hearing and cognitive functions have not been well studied. Cognitive function was evaluated by the Montreal Cognitive Assessment (MoCA). Hearing function was assessed by audiometric pure-tone hearing thresholds at different frequencies, including 0.5 kHz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, and 12.5 kHz, with the lower hearing thresholds indicating better hearing function. Cognitive and hearing functions were measured on 379 complete twin pairs (240 monozygotic and 139 dizygotic pairs) with a median age of 50 years (range: 40-80 years)...
August 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
journal
journal
41025
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"