Dementia and the Risk of Periodontitis: A Population-Based Cohort Study

Area of Science:

• Neurology
• Periodontology
• Epidemiology

Background:

• Dementia and Alzheimer's disease (AD) are increasingly recognized for potential links to periodontitis (PD).
• The independent association between PD and dementia/AD, controlling for confounding factors, remains unclear.
• Understanding this relationship is crucial for public health and patient management.

Purpose of the Study:

• To investigate the longitudinal risk of developing periodontitis (PD) in patients with dementia and Alzheimer's disease (AD).
• To determine if PD risk is associated with dementia and AD independently of confounding variables.
• To explore the age-dependent effect of dementia on PD development.

Main Methods:

• A retrospective cohort study involving 8,640 dementia patients and 8,640 matched controls without dementia.
• Propensity score matching was used to minimize confounding factors.
• Cox proportional hazard models and cumulative probability analyses were employed to assess PD risk over 10 years.
• Sensitivity analyses were conducted for AD-associated dementia.

Main Results:

• Patients with dementia had a significantly higher risk of developing PD (adjusted hazard ratio = 1.915).
• The risk of PD in dementia patients was age-dependent, with younger individuals showing a greater likelihood of developing PD.
• A similar increased risk of PD was observed in patients with AD (adjusted hazard ratio = 1.667).

Conclusions:

• Dementia and AD are independently associated with an increased risk of developing periodontitis (PD).
• Age is a significant factor, with younger dementia patients exhibiting a higher PD risk.
• These findings highlight a critical link between neurodegenerative diseases and oral health, independent of systemic confounders.