Bidirectional relationship between renal function and periodontal disease in older Japanese women

ObjectivesThe purpose of this study was to evaluate the reciprocal effects of chronic kidney disease (CKD) and periodontal disease. Material and MethodsA total of 332 postmenopausal never smoking women were enrolled, and their serum high-sensitivity C-reactive protein, serum osteocalcin and serum cystatin C levels were measured. Poor renal function was defined as serum cystatin C>0.91mg/l. Periodontal disease markers, including clinical attachment level and the periodontal inflamed surface area (PISA), were also evaluated. Logistic regression analysis was conducted to evaluate the relationships between renal function and periodontal disease markers, serum osteocalcin level and hsCRP level. The prevalence-rate ratios (PRRs) on multiple Poisson regression analyses were determined to evaluate the relationships between periodontal disease markers and serum osteocalcin, serum cystatin C and serum hsCRP levels. ResultsOn logistic regression analysis, PISA was significantly associated with serum cystatin C level. The odds ratio for serum cystatin C level was 2.44 (p=0.011). The PRR between serum cystatin C level and periodontal disease markers such as number of sites with clinical attachment level 6mm was significantly positive (3.12, p<0.001). Similar tendencies were shown for serum osteocalcin level. ConclusionThis study suggests that CKD and periodontal disease can have reciprocal effects.