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Effect of Early Life Income and Sugars Intake on Child Oral Health: Marginal Structural Modelling Using a Birth

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  • 1School of Dentistry, Faculty of Health and Behavioural Sciences, The University of Queensland, Brisbane, Queensland, Australia.

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|May 5, 2025
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Summary
This summary is machine-generated.

Early life socioeconomic status (SES) and high free sugar intake significantly increase children's risk of dental caries. Addressing these factors early can help reduce oral health inequalities.

Keywords:
Birth cohort studyCausal inference approachChild dental cariesSocioeconomic inequalitiesSugars intake

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Area of Science:

  • Public Health
  • Pediatric Dentistry
  • Epidemiology

Background:

  • Child oral health is established early and influenced by socioeconomic status (SES).
  • The direct and indirect pathways through which early life SES affects child oral health, particularly via free sugar intake, require further investigation.
  • Understanding these pathways is crucial for developing targeted interventions to improve oral health outcomes.

Purpose of the Study:

  • To investigate the pathways through which household income at birth and free sugar intake influence child oral health.
  • To apply marginal structural modeling to differentiate direct and indirect effects of SES on dental caries.
  • To quantify the mediating role of free sugar intake in the relationship between early life SES and oral health.

Main Methods:

  • Utilized data from the SMILE prospective birth cohort study of Australian mother/newborn dyads.
  • Employed marginal structural modeling and a causal directed acyclic graph to analyze the influence of household income at birth and free sugar intake at age 2 on dental caries experience by age 5.
  • Balanced baseline confounders using stabilized inverse probability of treatment weighting.

Main Results:

  • Children born into low-income households had 1.65 times higher accumulated dental caries experience by age 5 compared to those from high-income households.
  • High free sugar intake showed significant direct effects on both the prevalence (1.55 times higher) and cumulative experience (2.64 times higher) of dental caries.
  • A notable proportion of the effect of household income on dental caries was mediated by free sugar intake.

Conclusions:

  • Socioeconomic disparities at birth and immediate factors like sugar consumption directly and indirectly impact child oral health.
  • Early and appropriate interventions targeting socioeconomic variations and sugar intake are essential for mitigating oral health inequities.
  • Findings highlight the importance of a multi-faceted approach to improving child oral health, considering both socioeconomic determinants and dietary habits.