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Alzheimer's Research & Therapy
Published in: Alzheimer's Research & Therapy 1/2017

Open Access 01-12-2017 | Research

Association between chronic periodontitis and the risk of Alzheimer’s disease: a retrospective, population-based, matched-cohort study

Authors: Chang-Kai Chen, Yung-Tsan Wu, Yu-Chao Chang

Published in: Alzheimer's Research & Therapy | Issue 1/2017

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Abstract

Background

Although recent short-term cross-sectional studies have revealed that chronic periodontitis (CP) may be a risk factor for increased cognitive impairment in patients with Alzheimer’s disease (AD), systematic reviews and long-term longitudinal studies have provided less clear evidence regarding the relationship between CP and AD. Therefore, we conducted a retrospective cohort study using the National Health Insurance Research Database (NHIRD) of Taiwan to determine whether patients with CP are at increased risk of developing AD.

Methods

We conducted a retrospective matched-cohort study using the NHIRD of Taiwan. We identified 9291 patients newly diagnosed with CP between 1997 and 2004. A total of 18,672 patients without CP were matched to the patient cohort according to sex, age, index year, co-morbidity and urbanisation level. Cox proportional hazards regression analyses were performed to evaluate the subsequent risk of AD.

Results

Patients with CP had a higher prevalence of hyperlipidaemia, depression, traumatic brain injury and co-morbidities, as well as higher urbanisation levels, than those in the unexposed cohort (all p < 0.01). At the final follow-up, totals of 115 (1.24%) and 208 (1.11%) individuals in the CP exposed and unexposed groups, respectively, had developed AD. Patients with 10 years of CP exposure exhibited a higher risk of developing AD than unexposed groups (adjusted HR 1.707, 95% CI 1.152–2.528, p = 0.0077).

Conclusions

Our findings demonstrate that 10-year CP exposure was associated with a 1.707-fold increase in the risk of developing AD. These findings highlight the need to prevent progression of periodontal disease and promote healthcare service at the national level.
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Metadata
Title
Association between chronic periodontitis and the risk of Alzheimer’s disease: a retrospective, population-based, matched-cohort study
Authors
Chang-Kai Chen
Yung-Tsan Wu
Yu-Chao Chang
Publication date
01-12-2017
Publisher
BioMed Central
Published in
Alzheimer's Research & Therapy / Issue 1/2017
Electronic ISSN: 1758-9193
DOI
https://doi.org/10.1186/s13195-017-0282-6

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