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. 2022;15(2):197-208.
doi: 10.1159/000520902. Epub 2021 Dec 16.

Association between Marginally Low Birth Weight and Obesity-Related Outcomes and Indirect Effects via Attention-Deficit Hyperactivity Disorder and Abnormal Eating

Xiaotong Wei  1 , Jiajin Hu  2 , Yang Liu  2 , Yanan Ma  3 , Deliang Wen  2
Affiliations

Association between Marginally Low Birth Weight and Obesity-Related Outcomes and Indirect Effects via Attention-Deficit Hyperactivity Disorder and Abnormal Eating

Xiaotong Wei et al. Obes Facts. 2022.

Abstract

Introduction: Evidence of the association between children born with marginally low birth weight (MLBW) and obesity-related outcomes was controversial, and our study aimed to examine the role of attention-deficit hyperactivity disorder (ADHD) and/or abnormal eating in these associations.

Methods: A retrospective cohort study consisting of 677 Chinese children was conducted. Obesity-related outcomes (body mass index [BMI], waist circumference [WC], skinfold thickness [SF], body fat, blood pressure, lipids, and blood glucose), behaviour problems (ADHD and eating behaviour) and birth weight were collected. Mediation analyses were used to explore whether ADHD and/or abnormal eating was an intermediary factor in the MLBW-OB relationship.

Results: Children with MLBW tended to have higher SF, triglycerides, fasting blood glucose, waistline, body fat, and abdominal obesity risks. Birth weight was negatively related to obesity-related outcomes, and the associations were mediated, partially, by the increased risk of ADHD or abnormal eating behaviour after adjustment for the BMI Z score. Furthermore, lower birth weight predicted higher WC indirectly through emotional overeating caused by ADHD (β: -0.10; 95% confidence interval: -0.19, -0.01).

Conclusion: Our study suggests the hypothetical role of ADHD and abnormal eating as underlying mechanisms in the association between MLBW and obesity-related outcomes, providing novel scientific evidence for childhood development interventions.

Keywords: Attention-deficit hyperactivity disorder; Birth weight; Eating behaviour; Metabolic syndrome; Obesity.

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Conflict of interest statement

The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analysis, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Fig. 1
Fig. 1
a Birth weight predicted obesity-related outcomes of children indirectly through ADHD. b Birth weight predicted obesity-related outcomes of children indirectly through eating behaviour. c Birth weight predicted obesity-related outcomes of children indirectly through both ADHD and eating behaviour.
Fig. 2
Fig. 2
a–e Models: ADHD mediation models of the associations between birth weight and obesity-related outcomes in children. f–h Models: eating behaviour mediation models of the associations between birth weight and obesity-related outcomes in children. All analyses are adjusted for sex, age (years), gestational age at birth, breastfeeding duration, PA group, sedentary time, maternal age, parental BMI, parent with a university degree, smoking during pregnancy, health status during pregnancy, caesarean section, Apgar score 5 min after birth, household income, and the BMI Z score of children.
See this image and copyright information in PMC

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