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Childhood Oral Health Linked to Adult Cardiovascular Disease Risk, Danish Study Finds

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Childhood Oral Health Linked to Adult Cardiovascular Disease, Danish Study Reveals

A nationwide Danish cohort study indicates a correlation between childhood oral health and the incidence of atherosclerotic cardiovascular disease (ASCVD) in adulthood. While previous research has linked adult oral disease to cardiovascular disease (CVD), less is known about the association with childhood oral health.

ASCVD is a major cause of premature mortality. Identifying risk factors in childhood and young adulthood is important for preventive strategies. Oral diseases, such as periodontitis, gingivitis, and dental caries, are common in children and adults. These conditions involve oral inflammation and can contribute to systemic inflammation and the translocation of oral bacteria, which are hypothesized to drive atherosclerotic plaque formation.

Study Methodology

Researchers utilized national registry data from Denmark, including over 568,000 individuals aged 30 and above. Participants were categorized based on the presence and severity of dental caries and gingivitis during their childhood, using data from the National Child Odontology Registry. Cox regression analyses were performed to identify associations between these oral conditions and ASCVD in adult life. Analyses were stratified by sex, education, and type 2 diabetes.

Key Findings

The study observed an association between poor childhood oral health and a higher likelihood of developing ASCVD in adulthood.

The risk was most pronounced in children with persistently poor or declining oral health. It is important to note that the study is observational and does not establish causality.

  • Moderate dental caries and gingivitis affected up to 68% of participants.
  • Males: Severe dental caries in childhood was associated with a 32% higher risk of ASCVD. Severe gingivitis was associated with a 21% higher risk.
  • Females: Severe dental caries in childhood was associated with a 45% higher risk of ASCVD. Severe gingivitis was associated with a 31% higher risk.
  • Myocardial infarction (MI) was the most common form of ASCVD in males (42% of diagnoses), while ischemic stroke (IS) was most common in females (54% of diagnoses).

Childhood Dental Caries and ASCVD Risk

The study identified specific patterns of risk related to dental caries trajectories:

  • Worsening moderate to severe dental caries: Boys had a 26% higher incidence of adult ASCVD; girls had a 45% higher risk.
  • Stable moderate to severe dental caries: Males had a 21% higher risk; females had a 41% higher risk compared to a stable low-caries history.
  • Improved oral health over time: Adult ASCVD risk remained elevated, 19% higher in males and 31% higher in females.

Worsening or persistently high levels of childhood oral disease were associated with the highest relative risks.

Gingivitis Trajectories and Adult ASCVD Risk

Similar trends were observed for moderate to severe gingivitis, though with a less pronounced pattern:

  • Improving gingivitis trajectories: Males showed an 8% increased risk of adult ASCVD.
  • Worsening or stable gingivitis: Males showed a 13% increased risk.
  • Worsening gingivitis: Females showed a 27% increase in ASCVD risk.
  • Stable gingivitis: Females showed a 25% increase in ASCVD risk.

This pattern, where dental caries showed stronger associations than gingivitis, may reflect the frequent co-occurrence of gingivitis with severe dental caries. Inflammation is a proposed pathway linking oral disease to cardiovascular disease. Findings align with earlier studies linking poor childhood oral health to thicker arterial walls and higher blood pressure in adulthood.

Sex-Specific Risks of Childhood Oral Disease

The study's interaction analyses did not identify an effect of sex on oral disease. This suggests that differences in hazard ratios might reflect sex-specific baseline ASCVD hazards rather than a direct interaction between sex and childhood oral disease. Further research is needed to understand underlying mechanisms.

Socioeconomic Disparities in Oral Health and ASCVD

The study suggests that underprivileged children, who often have limited access to dental healthcare, may face a higher risk for adult ASCVD, potentially perpetuating health disparities. However, the study was conducted in Denmark, where healthcare access differs from many other countries, limiting direct generalizability to all populations.

Study Strengths and Limitations

Strengths:

  • Nationwide cohort study with a long follow-up period.
  • Accurate ASCVD and dental caries diagnosis data.
  • Findings are generalizable within the Danish context.

Limitations:

  • Lack of data on smoking and diet, which influence both oral health and ASCVD risk.
  • Residual confounding is possible despite adjustments for educational status.
  • No data on adult oral health was available, although researchers assume childhood oral hygiene habits often continue into adulthood.
  • The relatively young mean age of the sample might bias estimates towards early-onset ASCVD.

Conclusion

The study's findings indicate an increased risk of ASCVD in adulthood following moderate-to-severe childhood oral disease, regardless of whether the condition was stable or worsening.

While the observed relative risks were modest, the high prevalence of childhood oral disease suggests significant public health implications.

Investing in childhood oral health may offer long-term benefits beyond oral cavity health, providing further motivation for increased investment in pediatric dental care.

Future studies are encouraged to validate these findings, which could identify a modifiable risk factor for ASCVD.