| Background: Periodontal disease is an inflammatory disease caused by dental plaque that affects the supporting tissue around the teeth.It is a common oral health problem in the elderly population and one of the main causes of tooth mobility and loss in adults.Tooth mobility and loss may lead to masticatory dysfunction and then affect the nutritional absorption of patients.Furthermore,the appearance and even psychological of the elderly may also be affected.In addition,there is a close correspondence between periodontal disease and many systematic diseases.And the burden of periodontal disease will continue to increase with the aging of the population.Moreover,the prevalence of periodontal disease reported in different countries has shown substantial variability,and the same variability was observed among published different studies and different provinces in China.Therefore,it is necessary to conduct a systematic review and meta-analysis based on relevant studies available to find the reasons.Besides,we can get better understand the epidemiologicalcharacteristics of periodontal disease in the elderly and provide guidance for clinical treatment.Objective: To evaluate the epidemiological characteristics of periodontal disease among the elderly population in mainland China,and to analyze the reasons for the large variability of the prevalence of periodontal disease among the studies.Methods: Systematically electronic search was performed in PubMed,Embase,Chinese National Knowledge Infrastructure Database,Chinese Biomedical Literature Database,Chinese Wan Fang Database,and Chongqing VIP Database.Literatures about prevalence of periodontal disease in the elderly population in mainland China were regarded as relevant studies,as well as potential relevant literatures from references of these documents.Relevant studies were screened according to the established inclusion and exclusion criteria,and all the included literatures were evaluated by STROBE.The final included literatures must meet the included and quality criteria.Relevant data were extracted based on the established data extraction table,including the survey date,provinces,diagnostic criteria,sample size,cases and prevalence of periodontal diseases.Meta-analysis of the extracted data was carried out by Stata 12.0software and RevMan 5.1 software.Results: A total of 26 articles were included,with a total sample size of 66849,including the second,the third and the forth national oral epidemiological survey.Given that there is no unified diagnostic criteria for periodontal disease,the prevalence of periodontal disease was indicated by the detection rate of bleeding on probing(BOP+),periodontal pocket depth(PD)and clinical attachment loss(CAL),which were 57.9%(95%CI:40.8%-75.0%),61.4%(95%CI: 51.2%-71.7%)and 66.5%(95%CI:57.6%-75.4%),respectively.The results of subgroup analysis showed that there was no significant difference in the detection rate of BOP(+)and PD(?4mm)between urban and rural elderly people,while the detection rate of CAL(?4mm)in rural was slightly higher than that in urban,RR=1.04(95%CI:1.00-1.08).No significant difference was observed in the detection rate of BOP(+)between men and women.The detection rate of PD(?4mm)in men(62.2% [95% CI: 47.9%-76.4%])was significantly higher than that in women(52.9% [95% CI: 37.7%-68.0%],RR = 1.16(95% CI: 1.08-1.25),and the detection rate of CAL(?4mm)in men(68.0%[95%CI: 62.0%-74.0%])was also significant higher than that in women(57.4%[95%CI:49.2%-65.5%]),RR=1.18(95% CI: 1.12-1.25).Conclusions: More than half of the elderly in mainland China suffer from periodontal disease.The prevalence of periodontal disease between the urban and rural elderly showed no significant difference,while theprevalence in male is higher than that in female.And there is no unified diagnostic criteria for periodontal disease in the original epidemiological studies.Therefore,more large-scale,high-quality original epidemiological studies based on unified diagnostic criteria are needed.In addition,more policies and measures on the prevention and treatment of periodontal disease are required to improve oral health care awareness,and to prevent and control periodontal disease in the elderly. |
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