Abstract
Whether periodontitis increases the risk of diabetic microangiopathy remains controversial. The present meta-analysis aims to investigate the relationship between periodontitis and diabetic microangiopathy in patients with type 2 diabetes mellitus. PubMed, EMBASE, Web of Science, the Cochrane Library, CNKI, and WanFang data were searched without language restrictions. The methodological quality of the studies included was assessed using Newcastle-Ottawa Scale method, and meta-analysis was performed by Review Manager 5.3. Odds ratio (OR) and 95% confidence interval (CI) were used to assess the risk of periodontitis for diabetic microangiopathy among patients with type 2 diabetes. Thirteen cross-sectional studies, covering 10570 participants, were included in the present meta-analysis. The results demonstrated that periodontitis was associated with increased risk of type 2 diabetic microangiopathy (OR: 2.43, 95% CI: 1.65-3.56), diabetic retinopathy (OR: 4.33, 95% CI: 2.19-8.55), and diabetic nephropathy (OR: 1.75, 95% CI: 1.07-2.85), while periodontitis was not associated with diabetic neuropathy (OR: 0.99, 95% CI: 0.19-5.12). Subgroup analysis among the studies in Asian (OR: 3.06, 95% CI: 1.94-4.84) and North American (OR: 1.42, 95% CI: 1.08-1.86) populations confirmed the existed association between periodontitis and type 2 diabetic microangiopathy. The relationship still existed in groups with sample size larger than 500 (OR: 1.77, 95% CI: 1.34-2.34) and smaller than 500 (OR: 3.33, 95% CI: 1.38-8.03). A sensitivity analysis confirmed the stability of the results by excluding moderate quality studies or removing articles one after the other. Current evidences have proved that periodontitis is associated with increased risk of diabetic microangiopathy in patients with type 2 diabetes mellitus. This conclusion may provide useful evidence for correlated clinical researches. PROSPERO registration number CRD42021247773.
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