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Grønbæk JK, Laustsen AF, Toescu S, Pizer B, Mallucci C, Aquilina K, Molinari E, Hjort MA, Gumbeleviciene L, Hauser P, Pálmafy B, van Baarsen K, Hoving E, Zipfel J, Ehrstedt C, Grillner P, Callesen MT, Frič R, Wibroe M, Nysom K, Schmiegelow K, Sehested A, Mathiasen R, Juhler M. Left-handedness should not be overrated as a risk factor for postoperative speech impairment in children after posterior fossa tumour surgery: a prospective European multicentre study. Childs Nerv Syst 2022; 38:1479-1485. [PMID: 35759029 DOI: 10.1007/s00381-022-05567-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 05/20/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Cerebellar mutism syndrome (CMS) is a severe neurological complication of posterior fossa tumour surgery in children, and postoperative speech impairment (POSI) is the main component. Left-handedness was previously suggested as a strong risk factor for POSI. The aim of this study was to investigate the relationship between handedness and the risk of POSI. METHODS We prospectively included children (aged < 18 years) undergoing surgery for posterior fossa tumours in 26 European centres. Handedness was assessed pre-operatively and postoperative speech status was categorised as either POSI (mutism or reduced speech) or habitual speech, based on the postoperative clinical assessment. Logistic regression was used in the risk factor analysis of POSI as a dichotomous outcome. RESULTS Of the 500 children included, 37 (7%) were excluded from the present analysis due to enrolment at a reoperation; another 213 (43%) due to missing data about surgery (n = 37) and/or handedness (n = 146) and/or postoperative speech status (n = 53). Out of the remaining 250 (50%) patients, 20 (8%) were left-handed and 230 (92%) were right-handed. POSI was observed equally frequently regardless of handedness (5/20 [25%] in left-handed, 61/230 [27%] in right-handed, OR: 1.08 [95% CI: 0.40-3.44], p = 0.882), also when adjusted for tumour histology, location and age. CONCLUSION We found no difference in the risk of POSI associated with handedness. Our data do not support the hypothesis that handedness should be of clinical relevance in the risk assessment of CMS.
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Affiliation(s)
- Jonathan Kjær Grønbæk
- Department of Neurosurgery, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark. .,Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark.
| | - Aske Foldbjerg Laustsen
- Department of Neurosurgery, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark.,Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark
| | - Sebastian Toescu
- Department of Neurosurgery, Great Ormond Street Hospital for Children, Great Ormond Street, London, WC1N 3JH, UK.,Developmental Imaging and Biophysics Section, University College London Great Ormond Street Institute of Child Health, 30 Guilford St, London, WC1N 1EH, UK
| | - Barry Pizer
- University of Liverpool, Liverpool, L69 3BX, UK
| | - Conor Mallucci
- Department of Paediatric Neurosurgery, Alder Hey Children's NHS Foundation Trust, E Prescot Rd, Liverpool, L14 5AB, UK
| | - Kristian Aquilina
- Department of Neurosurgery, Great Ormond Street Hospital for Children, Great Ormond Street, London, WC1N 3JH, UK
| | - Emanuela Molinari
- Department of Neurology, The Queen Elizabeth University Hospital, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Magnus Aasved Hjort
- Department of Pediatric Hematology and Oncology, St Olavs Hospital, 7006, Trondheim, Norway
| | - Lingvita Gumbeleviciene
- Department of Neurology, Hospital of Lithuanian University of Health Sciences Kauno Klinikos, Eiveniu 2, 50161, Kaunas, Lithuania
| | - Peter Hauser
- 2nd Dept of Pediatrics, Semmelweis University, Tűzoltó u. 7-9, 1094, Budapest, Hungary.,Velkey László Child's Health Center, BAZ County Central Hospital and University Teaching Hospital, Szentpéteri kapu 72-76, 3526, Miskolc, Hungary
| | - Beatrix Pálmafy
- National Institute of Neuroscience, Amerikai út 57, 1145, Budapest, Hungary
| | - Kirsten van Baarsen
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS, Utrecht, The Netherlands
| | - Eelco Hoving
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS, Utrecht, The Netherlands
| | - Julian Zipfel
- Department of Neurosurgery, Pediatric Neurosurgery, University Hospital Tuebingen, Hoppe-Seyler-Str. 3, 72076, Tuebingen, Germany
| | - Christoffer Ehrstedt
- Department of Women's and Children's Health, Uppsala University, Uppsala University Children's Hospital, 751 85, Uppsala, Sweden
| | - Pernilla Grillner
- Pediatric Oncology Unit, Astrid Lindgren's Children's Hospital, 6 Karolinska vägen, 171 76, Stockholm, Sweden
| | - Michael Thude Callesen
- Department of Pediatric Oncology and Haematology, H.C. Andersen Children's Hospital, Kløvervænget 23C, 5000, Odense, Denmark
| | - Radek Frič
- Department of Neurosurgery, Oslo University Hospital, Postboks 4950 Nydalen, 0424, Oslo, Norway
| | - Morten Wibroe
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark
| | - Karsten Nysom
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark
| | - Kjeld Schmiegelow
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark.,Institute of Clinical Medicine, Faculty of Medicine, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark
| | - Astrid Sehested
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark
| | - René Mathiasen
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark
| | - Marianne Juhler
- Department of Neurosurgery, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen E, Denmark.,Institute of Clinical Medicine, Faculty of Medicine, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark.,Department of Neurosurgery, Aarhus University Hospital, Palle Juul-Jensens, Boulevard 99, 8200, Aarhus, Denmark
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Pfeifer LS, Schmitz J, Papadatou-Pastou M, Peterburs J, Paracchini S, Ocklenburg S. Handedness in twins: meta-analyses. BMC Psychol 2022; 10:11. [PMID: 35033205 PMCID: PMC8760823 DOI: 10.1186/s40359-021-00695-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 11/24/2021] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND In the general population, 10.6% of people favor their left hand over the right for motor tasks. Previous research suggests higher prevalence of atypical (left-, mixed-, or non-right-) handedness in (i) twins compared to singletons, and in (ii) monozygotic compared to dizygotic twins. Moreover, (iii) studies have shown a higher rate of handedness concordance in monozygotic compared to dizygotic twins, in line with genetic factors playing a role for handedness. METHODS By means of a systematic review, we identified 59 studies from previous literature and performed three sets of random effects meta-analyses on (i) twin-to-singleton Odds Ratios (21 studies, n = 189,422 individuals) and (ii) monozygotic-to-dizygotic twin Odds Ratios (48 studies, n = 63,295 individuals), both times for prevalence of left-, mixed-, and non-right-handedness. For monozygotic and dizygotic twin pairs we compared (iii) handedness concordance Odds Ratios (44 studies, n = 36,217 twin pairs). We also tested for potential effects of moderating variables, such as sex, age, the method used to assess handedness, and the twins' zygosity. RESULTS We found (i) evidence for higher prevalence of left- (Odds Ratio = 1.40, 95% Confidence Interval = [1.26, 1.57]) and non-right- (Odds Ratio = 1.36, 95% Confidence Interval = [1.22, 1.52]), but not mixed-handedness (Odds Ratio = 1.08, 95% Confidence Interval = [0.52, 2.27]) among twins compared to singletons. We further showed a decrease in Odds Ratios in more recent studies (post-1975: Odds Ratio = 1.30, 95% Confidence Interval = [1.17, 1.45]) compared to earlier studies (pre-1975: Odds Ratio = 1.90, 95% Confidence Interval = [1.59-2.27]). While there was (ii) no difference between monozygotic and dizygotic twins regarding prevalence of left- (Odds Ratio = 0.98, 95% Confidence Interval = [0.89, 1.07]), mixed- (Odds Ratio = 0.96, 95% Confidence Interval = [0.46, 1.99]), or non-right-handedness (Odds Ratio = 1.01, 95% Confidence Interval = [0.91, 1.12]), we found that (iii) handedness concordance was elevated among monozygotic compared to dizygotic twin pairs (Odds Ratio = 1.11, 95% Confidence Interval = [1.06, 1.18]). By means of moderator analyses, we did not find evidence for effects of potentially confounding variables. CONCLUSION We provide the largest and most comprehensive meta-analysis on handedness in twins. Although a raw, unadjusted analysis found a higher prevalence of left- and non-right-, but not mixed-handedness among twins compared to singletons, left-handedness was substantially more prevalent in earlier than in more recent studies. The single large, recent study which included birth weight, Apgar score and gestational age as covariates found no twin-singleton difference in handedness rate, but these covariates could not be included in the present meta-analysis. Together, the secular shift and the influence of covariates probably make it unsafe to conclude that twinning has a genuine relationship to handedness.
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Affiliation(s)
- Lena Sophie Pfeifer
- Cognitive Psychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, 44780, Bochum, Germany.
| | - Judith Schmitz
- School of Medicine, University of St Andrews, St Andrews, Scotland
| | - Marietta Papadatou-Pastou
- School of Education, Department of Primary Education, National and Kapodistrian University of Athens, Athens, Greece
- Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Jutta Peterburs
- Institute of Systems Medicine and Department of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany
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Nelson EL, Gonzalez SL. Measuring infant handedness reliably from reaching: A systematic review. Laterality 2020; 25:430-454. [PMID: 32063179 PMCID: PMC7306446 DOI: 10.1080/1357650x.2020.1726367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 01/30/2020] [Indexed: 10/25/2022]
Abstract
Researchers have utilized reaching paradigms to measure infant handedness for more than a century. However, methods vary widely. Recent research has identified that the number of trials used in assessment is critical with the recommendation that at least 15 trials are necessary to reliably classify infants into handedness categories via statistical cutoffs. As a first step towards establishing best practices for the field, we identified, categorized, and synthesized findings according to trial number from studies that utilized reaching to index handedness in infants across the first two years of life using PRISMA guidelines. Database searches were conducted in PsycINFO, PubMed, and Ovid MEDLINE®. All articles published through May 2018 were included. Additional records were identified through other sources. After removing duplicates, 1,116 records were screened using the online software program Abstrackr. Of these records, 125 full-text articles were further assessed for eligibility, and 87 articles were included in the qualitative synthesis. Results revealed that the majority of papers published since 1890 (70%) do not meet the 15-trial minimum criterion for statistically reliable measurement of infant handedness. Broad themes from articles meeting the measurement criterion and implications for future research are discussed.
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Affiliation(s)
- Eliza L. Nelson
- Department of Psychology, Florida International University, Miami, FL, USA
| | - Sandy L. Gonzalez
- Department of Psychology, Florida International University, Miami, FL, USA
- Department of Psychology, New York University, New York, NY, USA
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Two Cohort and Three Independent Anonymous Twin Projects at the Keio Twin Research Center (KoTReC). Twin Res Hum Genet 2013; 16:202-16. [DOI: 10.1017/thg.2012.131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The Keio Twin Research Center has conducted two longitudinal twin cohort projects and has collected three independent and anonymous twin data sets for studies of phenotypes related to psychological, socio-economic, and mental health factors. The Keio Twin Study has examined adolescent and adult cohorts, with a total of over 2,400 pairs of twins and their parents. DNA samples are available for approximately 600 of these twin pairs. The Tokyo Twin Cohort Project has followed a total of 1,600 twin pairs from infancy to early childhood. The large-scale cross-sectional twin study (CROSS) has collected data from over 4,000 twin pairs, from 3 to 26 years of age, and from two high school twin cohorts containing a total of 1,000 pairs of twins. These data sets of anonymous twin studies have mainly targeted academic performance, attitude, and social environment. The present article introduces the research designs and major findings of our center, such as genetic structures of cognitive abilities, personality traits, and academic performances, developmental effects of genes and environment on attitude, socio-cognitive ability and parenting, genes x environment interaction on attitude and conduct problem, and statistical methodological challenges and so on. We discuss the challenges in conducting twin research in Japan.
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