| Literature DB >> 26996222 |
Yoshie Yokoyama1, Aline Jelenkovic2, Reijo Sund2, Joohon Sung3, John L Hopper3, Syuichi Ooki4, Kauko Heikkilä5, Sari Aaltonen2, Adam D Tarnoki6, David L Tarnoki6, Gonneke Willemsen7, Meike Bartels7, Toos C E M van Beijsterveldt7, Kimberly J Saudino8, Tessa L Cutler9, Tracy L Nelson10, Keith E Whitfield11, Jane Wardle12, Clare H Llewellyn12, Abigail Fisher12, Mingguang He13, Xiaohu Ding13, Morten Bjerregaard-Andersen14, Henning Beck-Nielsen15, Morten Sodemann16, Yun-Mi Song17, Sarah Yang3, Kayoung Lee18, Hoe-Uk Jeong19, Ariel Knafo-Noam20, David Mankuta21, Lior Abramson20, S Alexandra Burt22, Kelly L Klump22, Juan R Ordoñana23, Juan F Sánchez-Romera24, Lucia Colodro-Conde23, Jennifer R Harris25, Ingunn Brandt25, Thomas Sevenius Nilsen25, Jeffrey M Craig26, Richard Saffery26, Fuling Ji27, Feng Ning27, Zengchang Pang27, Lise Dubois28, Michel Boivin29, Mara Brendgen30, Ginette Dionne29, Frank Vitaro31, Nicholas G Martin32, Sarah E Medland32, Grant W Montgomery33, Patrik K E Magnusson34, Nancy L Pedersen34, Anna K Dahl Aslan34, Per Tynelius35, Claire M A Haworth36, Robert Plomin37, Esther Rebato38, Richard J Rose39, Jack H Goldberg40, Finn Rasmussen35, Yoon-Mi Hur19, Thorkild I A Sørensen41, Dorret I Boomsma7, Jaakko Kaprio5, Karri Silventoinen2.
Abstract
We analyzed birth order differences in means and variances of height and body mass index (BMI) in monozygotic (MZ) and dizygotic (DZ) twins from infancy to old age. The data were derived from the international CODATwins database. The total number of height and BMI measures from 0.5 to 79.5 years of age was 397,466. As expected, first-born twins had greater birth weight than second-born twins. With respect to height, first-born twins were slightly taller than second-born twins in childhood. After adjusting the results for birth weight, the birth order differences decreased and were no longer statistically significant. First-born twins had greater BMI than the second-born twins over childhood and adolescence. After adjusting the results for birth weight, birth order was still associated with BMI until 12 years of age. No interaction effect between birth order and zygosity was found. Only limited evidence was found that birth order influenced variances of height or BMI. The results were similar among boys and girls and also in MZ and DZ twins. Overall, the differences in height and BMI between first- and second-born twins were modest even in early childhood, while adjustment for birth weight reduced the birth order differences but did not remove them for BMI.Entities:
Keywords: BMI; birth order; height; zygosity
Mesh:
Year: 2016 PMID: 26996222 PMCID: PMC5100672 DOI: 10.1017/thg.2016.11
Source DB: PubMed Journal: Twin Res Hum Genet ISSN: 1832-4274 Impact factor: 1.587