Periodontal disease, renal dysfunction and heightened leukocytosis.

Background: Leukocytosis is a powerful predictor of incident chronic kidney disease (CKD) and related outcomes. However, the association between periodontitis measures and increased leukocytosis in the context of CKD has not been well described. We sought to identify which individual measures of periodontal disease may best associate with reduced estimated glomerular filtration rate (eGFR) and albuminuria, and to test if these measures were associated with increased leukocytosis in subjects with established CKD.

Methods: We estimated, among 13,270 participants in the National Health and Nutrition Examination Survey III study, the associations between case-based definition of periodontitis, clinical attachment loss (CAL) and pocket depth (PD) as individual measures of periodontal disease, with renal function measures and leukocytosis.

Results: In adjusted multivariate analyses, case-based definition of severe periodontitis was associated with albuminuria (β = 0.003, p = 0.01) but not with eGFR. However, CAL and PD were all individually associated with both albuminuria (β = 0.08, p < 0.001 and β = 0.06, p < 0.001, respectively) and eGFR (β = -0.05, p < 0.001 and β = -0.03, p < 0.001, respectively). We found significant associations between elevated CAL and PD with leukocytosis. Lastly, we found a marked association between the joint presence of CKD and elevated CAL or PD with leukocytosis (odds ratio (OR) 3.3, 95% confidence interval (CI) 1.4-7.5 and OR 3.2, 95% CI 1.1-9.7, respectively).

Conclusion: Individual measures of periodontal disease are associated with renal function and heightened leukocytosis in CKD subjects. The significantly added inflammatory burden noted in CKD subjects with periodontal disease argue for targeting periodontitis treatment as part of our multifaceted approach to CKD patients.