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      Growth and Cardiovascular Risk Factors in Prepubertal Children Born Large or Small for Gestational Age

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          Abstract

          Background: Both large and small birth sizes are associated with an increased risk of developing cardiovascular and metabolic problems later in life. We studied whether such associations can be observed at prepubertal age. Methods: A cohort of 49 large (LGA), 56 appropriate (AGA), and 23 small for gestational age (SGA)-born children (age range 5-8 years) were studied. Being born SGA, AGA, or LGA was the exposure, and being overweight at prepubertal age was the main outcome. Blood pressure measurements, laboratory parameters, and whole-body dual-energy X-ray absorptiometry were secondary outcomes. Results: The LGA-born children were significantly taller than the AGA controls (p = 0.03), and the SGA children were lighter and shorter compared to the AGA (p = 0.002 and 0.001) and LGA children (p < 0.001). The mean plasma glucose was higher in the LGA than in the SGA group (p = 0.006). Being born LGA (OR 3.82) and the ponderal index Z-score at birth (OR 4.24) were strong predictors for being overweight or obese in childhood. Conclusion: The children born LGA remained taller and heavier than those born AGA or SGA in mid-childhood, and they had a higher body mass index and body fat percentage than the SGA-born children. The differences in other cardiometabolic risk factors were minimal between the birth size groups.

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          Current approaches for assessing insulin sensitivity and resistance in vivo: advantages, limitations, and appropriate usage.

          Insulin resistance contributes to the pathophysiology of diabetes and is a hallmark of obesity, metabolic syndrome, and many cardiovascular diseases. Therefore, quantifying insulin sensitivity/resistance in humans and animal models is of great importance for epidemiological studies, clinical and basic science investigations, and eventual use in clinical practice. Direct and indirect methods of varying complexity are currently employed for these purposes. Some methods rely on steady-state analysis of glucose and insulin, whereas others rely on dynamic testing. Each of these methods has distinct advantages and limitations. Thus, optimal choice and employment of a specific method depends on the nature of the studies being performed. Established direct methods for measuring insulin sensitivity in vivo are relatively complex. The hyperinsulinemic euglycemic glucose clamp and the insulin suppression test directly assess insulin-mediated glucose utilization under steady-state conditions that are both labor and time intensive. A slightly less complex indirect method relies on minimal model analysis of a frequently sampled intravenous glucose tolerance test. Finally, simple surrogate indexes for insulin sensitivity/resistance are available (e.g., QUICKI, HOMA, 1/insulin, Matusda index) that are derived from blood insulin and glucose concentrations under fasting conditions (steady state) or after an oral glucose load (dynamic). In particular, the quantitative insulin sensitivity check index (QUICKI) has been validated extensively against the reference standard glucose clamp method. QUICKI is a simple, robust, accurate, reproducible method that appropriately predicts changes in insulin sensitivity after therapeutic interventions as well as the onset of diabetes. In this Frontiers article, we highlight merits, limitations, and appropriate use of current in vivo measures of insulin sensitivity/resistance.
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            Weights of placentae from small-for-gestational age infants revisited.

            The objective of the study was to investigate the association between placental weight and birthweight in appropriate (AGA) and small for gestational age (SGA) infants. Placental weight, birthweight and their ratio in chromosomally normal singleton pregnancies with SGA (n=1569) and AGA (n=15 047) infants were compared, and their determinants were studied by logistic regression. SGA infants had 24 per cent smaller placentae than AGA infants when gestational age was used as a covariate. Placental actual weight was also lower in SGA infants than in AGA infants of the same birthweight (P< 0.001). SGA infants had smaller placentae than the controls, suggesting that fetal growth depends on the actual weight of the placenta. Future studies should evaluate whether growth restriction could be reversed by therapeutic approaches increasing placental weight. Copyright 2001 Harcourt Publishers Ltd.
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              Is Open Access

              Birth Weight, Childhood Body Mass Index and Risk of Coronary Heart Disease in Adults: Combined Historical Cohort Studies

              Background Low birth weight and high childhood body mass index (BMI) is each associated with an increased risk of coronary heart disease (CHD) in adult life. We studied individual and combined associations of birth weight and childhood BMI with the risk of CHD in adulthood. Methods/Principal Findings Birth weight and BMI at age seven years were available in 216,771 Danish and Finnish individuals born 1924–1976. Linkage to national registers for hospitalization and causes of death identified 8,805 CHD events during up to 33 years of follow-up (median = 24 years) after age 25 years. Analyses were conducted with Cox regression based on restricted cubic splines. Using median birth weight of 3.4 kg as reference, a non-linear relation between birth weight and CHD was found. It was not significantly different between cohorts, or between men and women, nor was the association altered by childhood BMI. For birth weights below 3.4 kg, the risk of CHD increased linearly and reached 1.28 (95% confidence limits: 1.13 to 1.44) at 2 kg. Above 3.4 kg the association weakened, and from about 4 kg there was virtually no association. BMI at age seven years was strongly positively associated with the risk of CHD and the relation was not altered by birth weight. The excess risk in individuals with a birth weight of 2.5 kg and a BMI of 17.7 kg/m2 at age seven years was 44% (95% CI: 30% to 59%) compared with individuals with median values of birth weight (3.4 kg) and BMI (15.3 kg/m2). Conclusions/Significance Birth weight and BMI at age seven years appeared independently associated with the risk of CHD in adulthood. From a public health perspective we suggest that particular attention should be paid to children with a birth weight below the average in combination with excess relative weight in childhood.
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                Author and article information

                Journal
                HRP
                Horm Res Paediatr
                10.1159/issn.1663-2818
                Hormone Research in Paediatrics
                S. Karger AG
                1663-2818
                1663-2826
                2016
                February 2016
                18 November 2015
                : 85
                : 1
                : 11-17
                Affiliations
                Departments of aPediatrics and bClinical Physiology, University of Eastern Finland and Kuopio University Hospital, Kuopio, and cDepartment of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
                Author notes
                *Henrikki Nordman, Department of Pediatrics, Kuopio University Hospital, PO Box 100, FI-70029 Kuopio (Finland), E-Mail henrikki.nordman@kuh.fi
                Article
                441652 Horm Res Paediatr 2016;85:11-17
                10.1159/000441652
                26575838
                388b5146-0155-4d08-89e4-e5a94c6bff72
                © 2015 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                : 29 June 2015
                : 12 October 2015
                Page count
                Tables: 4, References: 23, Pages: 7
                Categories
                Original Paper

                Endocrinology & Diabetes,Neurology,Nutrition & Dietetics,Sexual medicine,Internal medicine,Pharmacology & Pharmaceutical medicine
                Catch-up growth,Birth size,Obesity,Large for gestational age,Cardiovascular risk factors

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