Prognostic factors affecting the short-term efficacy of non-surgical treatment of chronic periodontitis: a multilevel modelling analysis

Hui-Jie LiuQiu-Hong Li


Objective This current study is aimed to analyze the prognostic factors affecting the short-term efficacy of non-surgical treatment of patients in periodontitis from stage II to stage IV by the multilevel modelling analysis. Materials and Methods A total of 58 patients of chronic periodontitis were included in this study. Patients were clinically explored before and 3 months after the treatment, with the data of Δ probing depth (PD) [Δ PD = baseline PD – finial probing depth (FPD)] as the outcome variables. All the data were divided into site level, tooth level and patient level to construct a multi-layer linear model. Results Compared with the mesial sites and distal sites of the multi-rooted teeth, the number of PD ≥ 5mm or PD < 5mm after the treatment was significantly different ( P < 0.05), and the proportion of PD < 5mm was higher in mesial sites. The null model showed that Δ PD varied greatly between groups at various levels ( P <0.001), with prediction variable of site level, tooth level, and patient level accounted for 66%, 18%, and 16% of the overall difference, respectively. The complete model showed that the Δ PD of smokers was significantly lower than that of non-smokers ( P < 0.001). The Δ PD of the ...Continue Reading

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