Oral health & preventive dentistry · 2026
Mediation of Systemic Inflammation and Oxidative Stress Markers in the Association of Life's Crucial 9 with Periodontitis: Evidence from NHANES 2009-2014.
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Zhang Ruoyao, Han Chong, Hu Dijia, Chen Qiukai, Zheng Jinguo, Okinaga Toshinori
Аннотация
PURPOSE: To examine the cross-sectional association between LC9 and periodontitis using NHANES 2009-2014 data, while also investigating the roles of systemic inflammation and oxidative stress in this relationship.
MATERIALS AND METHODS: LC9 was calculated based on the 8 components of LE8 and the depression score assessed by the Patient Health Questionnaire-9. Periodontitis was assessed according to the CDC-AAP definition. Multivariable logistic regression and restricted cubic spline (RCS) analyses were used to explore the relationship between LC9 and periodontitis. Exploratory mediation analyses were performed to examine the roles of systemic inflammation and oxidative stress markers.
RESULTS: A total of 7191 participants were enrolled, and 3540 had periodontitis. In the fully adjusted model, LC9 was inversely associated with the odds of periodontitis (OR per 10-point increase 0.85, 95% CI 0.80-0.90, p 0.0001). Compared to Q1, participants with LC9 at Q2, Q3, and Q4 had statistically significantly lower periodontitis prevalence (OR 0.78, 0.64, and 0.62, respectively; p for trend = 0.0001). Most LC9 component scores were inversely associated with periodontitis. RCS analysis showed that LC9 was linearly associated with the odds of periodontitis. Exploratory mediation analyses suggested that white blood cell count, neutrophil count, systemic immune-inflammation index, serum albumin, and uric acid may explain 32.53%, 24.05%, 3.64%, 10.70%, and 6.64% of this association, respectively. Stratified analysis showed that age, race, and marital status moderate the relationship between LC9 and periodontitis.
CONCLUSION: LC9 was linearly and negatively associated with the odds of periodontitis; systemic inflammation and oxidative stress markers may partially explain this association. These findings suggest that LC9 may serve as a valuable, comprehensive tool for assessing the likelihood of developing periodontitis, emphasizing that improving overall cardiovascular and mental health may be associated with lower prevalence of periodontitis.
MATERIALS AND METHODS: LC9 was calculated based on the 8 components of LE8 and the depression score assessed by the Patient Health Questionnaire-9. Periodontitis was assessed according to the CDC-AAP definition. Multivariable logistic regression and restricted cubic spline (RCS) analyses were used to explore the relationship between LC9 and periodontitis. Exploratory mediation analyses were performed to examine the roles of systemic inflammation and oxidative stress markers.
RESULTS: A total of 7191 participants were enrolled, and 3540 had periodontitis. In the fully adjusted model, LC9 was inversely associated with the odds of periodontitis (OR per 10-point increase 0.85, 95% CI 0.80-0.90, p 0.0001). Compared to Q1, participants with LC9 at Q2, Q3, and Q4 had statistically significantly lower periodontitis prevalence (OR 0.78, 0.64, and 0.62, respectively; p for trend = 0.0001). Most LC9 component scores were inversely associated with periodontitis. RCS analysis showed that LC9 was linearly associated with the odds of periodontitis. Exploratory mediation analyses suggested that white blood cell count, neutrophil count, systemic immune-inflammation index, serum albumin, and uric acid may explain 32.53%, 24.05%, 3.64%, 10.70%, and 6.64% of this association, respectively. Stratified analysis showed that age, race, and marital status moderate the relationship between LC9 and periodontitis.
CONCLUSION: LC9 was linearly and negatively associated with the odds of periodontitis; systemic inflammation and oxidative stress markers may partially explain this association. These findings suggest that LC9 may serve as a valuable, comprehensive tool for assessing the likelihood of developing periodontitis, emphasizing that improving overall cardiovascular and mental health may be associated with lower prevalence of periodontitis.