Clinical Focus ›› 2024, Vol. 39 ›› Issue (8): 677-683.doi: 10.3969/j.issn.1004-583X.2024.08.001

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Longitudinal cohort study of oral health status and cognitive function in the elderly: A meta-analysis

Wang Lin1, Wang Ting1, Pu Xiaolan1, Ju Mei2()   

  1. 1. School of Nursing,Southwest Medical University,Luzhou 646000,China
    2. The Affiliated Hospital of Southwest Medical University,Luzhou 646000,China
  • Received:2024-05-31 Online:2024-08-20 Published:2024-09-03
  • Contact: Ju Mei,Email: 593576753@qq.com

Abstract:

Objective To explore the correlation between oral health status and the risk of cognitive dysfunction by meta-analysis. Methods Cohort studies on the correlation between oral health status and cognitive function from inception to August 2023 were searched in PubMed, Web of Science, EMBASE, Scopus, Chinese National Knowledge Infrastructure (CNKI), China Biomedical Literature Database (CBM), Wanfang, VIP and Duxiu databases. Two reviewers independently screened literatures, extracted data and evaluated the quality of included studies. Meta-analysis was performed using RevMan 5.3 and Stata 17.0 software. Results A total of 34 cohorts were included. The results of meta-analysis showed that the risk of cognitive impairment in the elderly with poor oral health status was significantly higher than that in the elderly with good oral health status (RR=1.31, 95%CI 1.18-1.46, P<0.01). The results of subgroup analysis showed that there were significant differences in periodontitis disease, posterior occlusal support, dentition status, and tooth loss (P<0.05), but there was no significant difference in the oral frailty (RR=1.32, 95%CI 0.96-1.81, P=0.09). There was no significant difference in the risk of oral health status and cognitive impairment in the subgroup with a follow-up time>10 years (RR=1.01, 95%CI 0.83-1.23, P=0.90), but a significant difference was detected in the subgroup with a follow-up time ≤10 years (RR=1.48, 95%CI 1.32-1.67, P<0.001). There was no significant difference in the risk of oral health status and cognitive impairment in the moderate quality subgroup (RR=1.05, 95%CI 0.91-1.20, P=0.51), but a significant difference was detected in the high quality subgroup (RR=1.35, 95%CI 1.21-1.51, P<0.01). Conclusion Oral health status is associated with the risk of cognitive dysfunction.

Key words: oral health, elderly, cognitive function, meta-analysis

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