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https://www.readbyqxmd.com/read/28322877/neighborhood-walkability-moderates-the-association-between-low-back-pain-and-physical-activity-a-co-twin-control-study
#1
J R Zadro, D Shirley, M B Pinheiro, A Bauman, G E Duncan, P H Ferreira
The aim of this study was to investigate whether neighborhood walkability moderates the association between low back pain (LBP) and physical activity (PA), using a co-twin design to control for genetics and shared environmental factors. A cross-sectional analysis was performed on 10,228 twins from the Washington State Twin Registry with available data on LBP from recruitment surveys between 2009 and 2013. LBP within the past 3months was our exposure variable. Our outcome variables were sufficient moderate or vigorous-intensity PA (MVPA, defined as at least 75min of vigorous-intensity PA, or 150min of moderate-intensity PA per week), and walking (≥150min per week)...
March 18, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28314387/twin-pregnancy-complicated-by-esophageal-atresia-duodenal-atresia-gastric-perforation-and-hypoplastic-left-heart-structures-in-one-twin-a-case-report-and-review-of-the-literature
#2
Mohamad K Abou Chaar, Mariana L Meyers, Bethany D Tucker, Henry L Galan, Kenneth W Liechty, Timothy M Crombleholme, Ahmed I Marwan
BACKGROUND: The antenatal diagnosis of a combined esophageal atresia without tracheoesophageal fistula and duodenal atresia with or without gastric perforation is a rare occurrence. These diagnoses are difficult and can be suspected on ultrasound by nonspecific findings including a small stomach and polyhydramnios. Fetal magnetic resonance imaging adds significant anatomical detail and can aid in the diagnosis of these complicated cases. Upon an extensive literature review, there are no reports documenting these combined findings in a twin pregnancy...
March 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28267634/chronic-low-back-pain-and-the-risk-of-depression-or-anxiety-symptoms-insights-from-a-longitudinal-twin-study
#3
Matt Fernandez, Lucia Colodro-Conde, Jan Hartvigsen, Manuela L Ferreira, Kathryn M Refshauge, Marina B Pinheiro, Juan R Ordoñana, Paulo H Ferreira
BACKGROUND CONTEXT: Pain is commonly associated with symptoms of depression or anxiety, although this relationship is considered bidirectional. There is limited knowledge regarding causal relationships. PURPOSE: This study aims to investigate whether chronic low back pain (LBP) increases the risk of depression or anxiety symptoms, after adjusting for shared familial factors. STUDY DESIGN: This is a longitudinal, genetically informative study design from the Murcia Twin Registry in Spain...
March 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28217238/fetus-in-fetu-case-report-and-brief-review-of-literature-on-embryologic-origin-clinical-presentation-imaging-and-differential-diagnosis
#4
Suhas Aithal Sitharama, Bibekanand Jindal, Mrudula Kumari Vuriti, Bikash Kumar Naredi, Sriram Krishnamurthy, Deepak Barathi Subramania
BACKGROUND: Fetus in fetu (FIF) is a rare entity in which a malformed diamniotic monochorionic parasitic fetal twin develops inside a normal co-twin's body, most commonly in the abdominal cavity. FIF is differentiated from the teratoma by the presence of vertebral column often with an appropriate arrangement of other organs or limbs around it. CASE REPORT: A two-and-a-half-year-old girl presented with a painless abdominal swelling in the right hypochondrium. On imaging, a heterogenous soft tissue mass with internal calcific densities was noted in the retroperitoneum...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28193312/leukocyte-and-skeletal-muscle-telomere-length-and-body-composition-in-monozygotic-twin-pairs-discordant-for-long-term-hormone-replacement-therapy
#5
Elina Sillanpää, Paula Niskala, Eija K Laakkonen, Elodie Ponsot, Markku Alén, Jaakko Kaprio, Fawzi Kadi, Vuokko Kovanen, Sarianna Sipilä
Estrogen-based hormone replacement therapy (HRT) may be associated with deceleration of cellular aging. We investigated whether long-term HRT has effects on leukocyte (LTL) or mean and minimum skeletal muscle telomere length (SMTL) in a design that controls for genotype and childhood environment. Associations between telomeres, body composition, and physical performance were also examined. Eleven monozygotic twin pairs (age 57.6 ± 1.8 years) discordant for HRT were studied. Mean duration of HRT use was 7.3 ± 3...
February 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28191586/attention-deficit-hyperactivity-disorder-symptoms-and-low-educational-achievement-evidence-supporting-a-causal-hypothesis
#6
Eveline L de Zeeuw, Catharina E M van Beijsterveldt, Erik A Ehli, Eco J C de Geus, Dorret I Boomsma
Attention Deficit Hyperactivity Disorder (ADHD) and educational achievement are negatively associated in children. Here we test the hypothesis that there is a direct causal effect of ADHD on educational achievement. The causal effect is tested in a genetically sensitive design to exclude the possibility of confounding by a third factor (e.g. genetic pleiotropy) and by comparing educational achievement and secondary school career in children with ADHD who take or do not take methylphenidate. Data on ADHD symptoms, educational achievement and methylphenidate usage were available in a primary school sample of ~10,000 12-year-old twins from the Netherlands Twin Register...
February 13, 2017: Behavior Genetics
https://www.readbyqxmd.com/read/28163210/are-people-with-chronic-low-back-pain-meeting-the-physical-activity-guidelines-a-co-twin-control-study
#7
Joshua Robert Zadro, Debra Shirley, Anita Amorim, Francisco Pérez-Riquelme, Juan R Ordoñana, Paulo H Ferreira
BACKGROUND: Despite a large amount of research investigating physical activity (PA) levels in people with chronic low back pain (LBP), no study has investigated whether people with chronic LBP are meeting the World Health Organization (WHO) PA guidelines. Furthermore, with genetics and the early shared environment substantially influencing the presence of LBP and PA engagement, these factors could confound the association between LBP and PA and need to be controlled for. PURPOSE: This study aimed to investigate the association between chronic LBP and meeting the PA guidelines, while controlling for the effects of genetics and early shared environment...
February 2, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28150444/the-influence-of-chorionicity-and-gestational-age-at-single-fetal-loss-on-the-risk-of-preterm-birth-in-twin-pregnancies-analysis-of-the-stork-multiple-pregnancy-cohort
#8
Francesco D'Antonio, Basky Thilaganathan, Tiran Dias, Asma Khalil
BACKGROUND: Single intrauterine death (sIUD) in twin pregnancies is associated with a significant risk of co-twin demise and preterm birth (PTB), especially in monochorionic (MC) twins. However, it is yet to be established whether the gestational age at loss may influence the pregnancy outcome. The aim of this study was to explore the risk of PTB according to the gestational age at the diagnosis of sIUD. METHODS: A cohort study of all twin pregnancies from a large regional network of 9 hospitals over a ten-year period...
February 2, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28140706/risk-factors-for-brain-damage-among-preterm-twins
#9
Irit Schushan-Eisen, Ayala Maayan-Metzger, Ram Mazkereth, Leah Leibovitch, Tzipora Strauss
AIM: To evaluate the perinatal and postnatal risk factors for various brain pathologies among preterm twins. METHODS: Retrospective data of 104 twin pairs of which one of the siblings had evidence of abnormal head ultrasound (HUS) and its co-twin with normal HUS served as control. RESULTS: Abnormal HUS consisted of periventricular echodensities among 69 infants, intraventricular hemorrhage among 28 infants, cystic periventricular leukomalacia among 10 infants, and other parenchymal brain pathologies among 5 infants...
February 21, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28130150/familial-risk-and-heritability-of-colorectal-cancer-in-the-nordic-twin-study-of-cancer
#10
Rebecca E Graff, Sören Möller, Michael N Passarelli, John S Witte, Axel Skytthe, Kaare Christensen, Qihua Tan, Hans-Olov Adami, Kamila Czene, Jennifer R Harris, Eero Pukkala, Jaakko Kaprio, Edward Giovannucci, Lorelei A Mucci, Jacob B Hjelmborg
BACKGROUND & AIMS: We analyzed data from twins to determine how much the familial risk of colorectal cancer can be attributed to genetic factors vs environment. We also examined whether heritability is distinct for colon vs rectal cancer, given evidence of distinct etiologies. METHODS: Our data set included 39,990 monozygotic and 61,443 same-sex dizygotic twins from the Nordic Twin Study of Cancer. We compared each cancer's risk in twins of affected co-twins relative to the cohort risk (familial risk ratio; FRR)...
January 24, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28120199/a-comprehensive-profiling-of-supragingival-bacterial-composition-in-chinese-twin-children-and-their-mothers
#11
Qin Du, Mingyun Li, Xuedong Zhou, Kun Tian
To investigate the factors influencing the oral microbiome, 16 twin pairs and their mothers were enrolled in this study. There were 7 monozygotic (MZ) twins and 9 dizygotic (DZ) twins, with an average age of 6.18 ± 3.5. Supragingival plaques and caries tissues were collected and the 16S rDNA was analyzed by 454 pyrosequencing. A total of 18 phyla and 179 genuses were found. Caries children harbored a higher portion of Actinobacteria than caries-free ones, and one lineage was found to be less abundant in the caries tissues compared to the supragingival plaque at each level from the phylum down to the genus level, which was Fusobacteria at Phylum, Fusobacteriia at Class, Fusobacteriales at Order, Leptotrichiaceae at Family and Leptotrichia at genus level...
January 24, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28116109/a-case-of-a-surviving-co-twin-diagnosed-with-porencephaly-and-renal-hypoplasia-after-a-single-intrauterine-fetal-death-at-21-weeks-of-gestation-in-a-monochorionic-monoamniotic-twin-pregnancy
#12
Hidenori Machino, Takayuki Iriyama, Toshio Nakayama, Atsushi Komatsu, Takeshi Nagamatsu, Yutaka Osuga, Tomoyuki Fujii
Monochorionic monoamniotic (MM) twin pregnancy carries a high risk of intrauterine fetal death (IUFD). Single IUFD in an MM twin pregnancy prior to 22 weeks of gestation has been reported to be strongly correlated with double twin demise. To our knowledge, there are no case reports on the natural course of a surviving co-twin in an MM twin pregnancy resulting in live birth after a single IUFD prior to 22 weeks of gestation. Here, we report a case of a surviving co-twin, after a single IUFD at 21 weeks of gestation in a MM twin pregnancy, with an antenatal diagnosis of renal hypoplasia and severe neurological damage leading to porencephaly, and live birth at 36 weeks of gestation...
January 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28108944/the-seroprevalence-of-antithyroid-peroxidase-antibodies-in-bipolar-families-and-bipolar-twins-results-from-two-longitudinal-studies
#13
G Snijders, L de Witte, E Mesman, S Kemner, R Vonk, R Brouwer, W A Nolen, H A Drexhage, M H J Hillegers
BACKGROUND: Previous studies of our group among bipolar offspring and bipolar twins showed significant higher prevalence's and levels of antithyroid peroxidase antibodies (TPO-Abs) in offspring and co-twins (without a mood disorder) compared to controls, suggesting that TPO-Abs might be considered as vulnerability factor (trait marker) for BD development. OBJECTIVES: Here we elucidate, in the same cohorts, but now after 12- and 6-year follow-up, whether TPO-abs should be considered as a 'trait' marker for BD...
December 2017: International Journal of Bipolar Disorders
https://www.readbyqxmd.com/read/28101894/sleep-quality-and-body-mass-index-a-co-twin-study
#14
Juan J Madrid-Valero, José M Martínez-Selva, Juan R Ordoñana
There is a consistent relationship between body mass index and sleep quality. However, the directionality and possible confounding factors of this relationship are unclear. Our aim is to confirm the association between sleep quality and body mass index, independent of possible genetic confounding, as well as to provide some indirect inferences about the directionality of this association. The co-twin study design was used to analyse the body mass index-sleep relationship in a sample of 2150 twins. We selected two parallel sub-samples of twins discordant for body mass index (n = 430 pairs), or discordant for sleep quality (n = 316 pairs)...
January 19, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28100511/higher-dietary-flavonoid-intakes-are-associated-with-lower-objectively-measured-body-composition-in-women-evidence-from-discordant-monozygotic-twins
#15
Amy Jennings, Alex MacGregor, Tim Spector, Aedín Cassidy
BACKGROUND: Although dietary flavonoid intake has been associated with less weight gain, there are limited data on its impact on fat mass, and to our knowledge, the contribution of genetic factors to this relation has not previously been assessed. OBJECTIVE: We examined the associations between flavonoid intakes and fat mass. DESIGN: In a study of 2734 healthy, female twins aged 18-83 y from the TwinsUK registry, intakes of total flavonoids and 7 subclasses (flavanones, anthocyanins, flavan-3-ols, flavonols, flavones, polymers, and proanthocyanidins) were calculated with the use of food-frequency questionnaires...
January 18, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28098741/does-familial-aggregation-of-chronic-low-back-pain-impact-on-recovery-a-population-based-twin-study
#16
J R Zadro, D Shirley, J F Sanchez-Romera, J R Ordoñana, P H Ferreira
STUDY DESIGN: Longitudinal twin-cohort study. OBJECTIVE: To investigate the impact familial aggregation of chronic low back pain (LBP) has on the recovery from chronic LBP. SUMMARY OF BACKGROUND DATA: LBP is a worldwide problem, with pain and disability often becoming chronic. Genetics and familial behaviours could significantly impact the recovery from chronic LBP but have not been extensively investigated. METHODS: 624 Spanish twins from the Murcia Twin Registry reported experiencing chronic LBP within the past two years during the 2009/11 data collection wave and were followed up in 2013...
January 16, 2017: Spine
https://www.readbyqxmd.com/read/28094432/maltreatment-associated-neurodevelopmental-disorders-a-co-twin-control-analysis
#17
Lisa Dinkler, Sebastian Lundström, Ruchika Gajwani, Paul Lichtenstein, Christopher Gillberg, Helen Minnis
BACKGROUND: Childhood maltreatment (CM) is strongly associated with psychiatric disorders in childhood and adulthood. Previous findings suggest that the association between CM and psychiatric disorders is partly causal and partly due to familial confounding, but few studies have investigated the mechanisms behind the association between CM and neurodevelopmental disorders (NDDs). Our objective was to determine whether maltreated children have an elevated number of NDDs and whether CM is a risk factor for an increased NDD 'load' and increased NDD symptoms when controlling for familial effects...
January 17, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28090349/the-association-between-parental-separation-during-childhood-and-obesity-in-adulthood-a-danish-twin-study
#18
J D Petersen, K O Kyvik, B L Heitmann, M E Vámosi
OBJECTIVE: The purpose of this study was to examine if parental separation during childhood is associated with obesity in adulthood. METHODS: A co-twin case-control study of 146 adult same-sexed twin pairs with discordant body mass index (BMI) (i.e. one of the twins should have a BMI of 20-25 kg/m(2), and the co-twin's BMI ≥ 30 kg/m(2)) was selected from Danish Twin Registry (DTR). In total of 236 eligible twin individuals participated in the study. Childhood parental separation (defined as separation from one of the biological parents, regardless of the reason for separation) for at least one year prior to age 17 was self-reported...
December 2016: Obesity Science & Practice
https://www.readbyqxmd.com/read/28045837/prevalence-incidence-proportion-and-heritability-for-tinnitus-a-longitudinal-twin-study
#19
Renata Bogo, Ahmed Farah, Kjell K Karlsson, Nancy L Pedersen, Magnus Svartengren, Åsa Skjönsberg
OBJECTIVES: The purpose of this longitudinal twin study was to explore the effect of tinnitus on hearing thresholds and threshold shifts over two decades and to investigate the genetic contribution to tinnitus in a male twin cohort (n = 1114 at baseline and 583 at follow-up). The hypothesis was that participants with faster hearing deterioration had a higher risk for developing tinnitus and there is an underlying role of genetic influences on tinnitus. DESIGN: Male mono- and dizygotic twin pairs, born between 1914 and 1958 were included...
December 30, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/28039552/cerebrospinal-fluid-microglia-and-neurodegenerative-markers-in-twins-concordant-and-discordant-for-psychotic-disorders
#20
Viktoria Johansson, Joel Jakobsson, Rebecca G Fortgang, Henrik Zetterberg, Kaj Blennow, Tyrone D Cannon, Christina M Hultman, Lennart Wetterberg, Mikael Landén
Schizophrenia and bipolar disorder are debilitating psychiatric disorders with partially shared symptomatology including psychotic symptoms and cognitive impairment. Aberrant levels of microglia and neurodegenerative cerebrospinal fluid (CSF) markers have previously been found in schizophrenia and bipolar disorder. We aimed to analyze familial and environmental influences on these CSF markers and their relation to psychiatric symptoms and cognitive ability. CSF was collected from 17 complete twin pairs, nine monozygotic and eight dizygotic, and from one twin sibling...
December 30, 2016: European Archives of Psychiatry and Clinical Neuroscience
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