Abstract
Studies examining the link between periodontitis and survival outcomes have yielded conflicting results in patients with chronic kidney disease (CKD). This systematic review with meta-analysis aims to assess the association between periodontitis and cardiovascular or all-cause mortality in CKD patients. A thorough search was conducted on the PubMed, Web of Science, and Embase databases for studies investigating the association between periodontitis and survival outcomes in CKD patients. Two authors independently scanned the titles or abstracts and then identified the eligible full-text article based on the PECOS criteria: Participants (CKD patients), Exposure (periodontitis), Comparison (mild/no periodontitis), Outcomes (cardiovascular or all-cause mortality), and Study design (retrospective or prospective cohort). Six cohort studies, including 7731 patients, were identified. The included studies had low-to-moderate risk of bias. The mean/median follow-up duration ranged from 18.1 months to 8.67 years. The all-cause mortality rate was 44.8% for patients with periodontitis and 28.0% for controls. Meta-analysis showed that periodontitis, defined through clinical attachment loss (CAL), was significantly associated with an increased risk of all-cause (adjusted hazard ratio [HR] 1.24; 95% confidence intervals [CI] 0.89-1.72; I2 = 80.9%) and cardiovascular mortality (HR 1.57; 95% CI 1.08-2.27; I2 = 34.0%). Additionally, a significant association between periodontitis and the risk of cardiovascular or all-cause mortality was observed in studies with a predominance of females, follow-up duration ≥5 years, all stages of CKD, and low risk of bias subgroups. Periodontitis is significantly associated with an increased risk of all-cause and cardiovascular mortality in CKD patients within low risk of bias subgroup or based on defining periodontitis through CAL. Registration number: PROSPERO CRD42018512391.
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