Research Article
Longitudinal Relationship between Plasma Reactive Oxygen Metabolites and Periodontal Condition in the Maintenance Phase of Periodontal Treatment
Table 6
Multiple linear regression analysis with change of CAL as the dependent variable in the all subjects (N = 45).
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We used backward elimination method with a P > 0.1 threshold for exclusion to construct the model. The candidate variables for the model were Teeth present, PPD at baseline, and PCR at baseline. The F-statistic was 7.374 (P value was 0.002), the R-square was 0.260, and the adjusted R-square of the model was 0.225. The variance inflation factor was <5 and condition index was <15. represents differences (value at follow-up minus value at baseline). N: number; CI: confidence interval; B: unstandardized regression coefficient; β: standardized coefficient; PPD: probing pocket depth; CAL: clinical attachment level; PCR: plaque control record. |