Background: Many studies have been conducted to explore the association between interleukin (IL)-1β C-511T polymorphism and risk of chronic periodontitis (CP) but with different or even contradictory results. A meta-analysis was performed to further explore their association.
Methods: PubMed, Chinese National Knowledge Infrastructure, and EMBASE were searched up to September 30, 2014 for relevant case-control studies. Two authors (D-YL and L-YX) independently selected studies and extracted data from included studies. The meta-analysis was performed using comprehensive meta-analysis software.
Results: Nineteen case-control studies involving 2,173 patients with CP and 3,900 healthy controls were included. Using a random-effects meta-analysis model, a non-significant association between IL-1β C-511T polymorphism and CP was identified (T versus C: odds ratio [OR] = 1.03, 95% confidence interval [CI] = 0.85 to 1.25; TT versus CC: OR = 1.03, 95% CI = 0.72 to 1.46; CT versus CC: OR = 0.96, 95% CI = 0.71 to 1.30; CT + TT versus CC: OR = 1.00, 95% CI = 0.74 to 1.34; TT versus CT + CC: OR = 1.05, 95% CI = 0.81 to 1.38), and sensitivity analysis indicated that the results were robust. Subgroup analyses also revealed a non-significant association. No publication bias was detected.
Conclusions: Based on currently available evidence, IL-1β C-511T polymorphism is not associated with the risk of developing CP. Additional research is warranted to further explore and confirm the association of genetic polymorphism and CP.
Keywords: Chronic periodontitis; interleukin-1; meta-analysis; periodontal diseases; periodontitis; polymorphism, genetic.