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March 3, 2021International Journal of EpidemiologyOpen Access

Evaluating the direct effects of childhood adiposity on adult systemic metabolism: a multivariable Mendelian randomization analysis

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Key result

Childhood body size affected 42 of 123 metabolic markers (P < 4.07 × 10-4), but 35 of these effects substantially attenuated when accounting for adult body size.

Why the study?

Whether childhood adiposity directly impacts intermediate markers of adult disease risk independently of adult adiposity is unclear.

Does childhood adiposity directly impact adult systemic metabolic markers independently of adult adiposity?

Population

Up to 24 925 adults for metabolic markers and 60 801 CAD cases and 123 504 controls

Comparison

Childhood body size accounting for adult body size

Design

Two-sample and multivariable Mendelian randomization study

Authors

TRTom G. RichardsonJMJuha MykkänenKPKatja Pahkala

Discussion

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Overview

Childhood adiposity effects on biomarkers largely attenuate after adult size adjustment; leaves open independent causal pathways for select markers.

Study Design

Type

Observational (n=209,230)

Structured PICO

Does childhood adiposity directly impact adult systemic metabolic markers independently of adult adiposity?

P
Population
Up to 24,925 adults for metabolic marker analysis and 184,305 individuals for coronary artery disease risk analysis to evaluate the effects of childhood adiposity.
E
Exposure
Childhood body size (assessed via genetic instruments in Mendelian randomization)
C
Comparator
Adult body size (multivariable Mendelian randomization accounting for adult body size)
O
Outcome
123 nuclear magnetic resonance-based metabolic markerssurrogate

Main Result

p-value: p=< 4.07 × 10-4

Childhood adiposity affects adult systemic metabolism and CAD risk predominantly through its influence on adulthood body size, rather than via direct independent effects.

Cite This Study

Richardson et al. (2021) conducted an observational in Childhood adiposity and adult systemic metabolism (n=209,230). Childhood body size was evaluated on 123 nuclear magnetic resonance-based metabolic markers (p=< 4.07 × 10-4). Childhood body size affected 42 of 123 metabolic markers (P < 4.07 × 10-4), but 35 of these effects substantially attenuated when accounting for adult body size.

synapsesocial.com/papers/6a785b02137c7dcc81be671fhttps://doi.org/10.1093/ije/dyab051
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Also Consider

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  4. 4Childhood Obesity and Age‐Related Diseases: A Systematic Review and Meta‐Analysis of Mendelian Randomization Evidence2025
  5. 5Childhood Obesity Raises GDM Risk Through Adult Obesity: Evidence From Lifecourse Mendelian Randomization Study2025