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Avances en Periodoncia e Implantología Oral
On-line version ISSN 2340-3209Print version ISSN 1699-6585
Abstract
ARDILA MEDINA, C.M.; VERGARA, S. and GUZMAN ZULUAGA, I.C.. A multilevel approach of patient, tooth and tooth site-related variables on the probing depth in patients with chronic periodontitis. Avances en Periodoncia [online]. 2013, vol.25, n.2, pp.91-97. ISSN 2340-3209.
Introduction: Multilevel analysis allows us to consider the behavior of repeated measurements of individual sites, knowing that teeth are grouped into nested within subjects. Objective: to assess the relative contribution of factors related to the subject, tooth and tooth site in the periodontal pocket depth. Materials and Methods: Clinical parameters and subgingival microorganisms were evaluated in 76 patients with chronic periodontitis. The influence of different factors on the probing depth was examined using a multilevel regression analysis. Results and conclusions: Most of the variance was attributed to site level (63%), followed by the tooth level (23%) and patient level (14%). Smokers (p=0.003) were significantly associated with deep pockets. The anterior teeth presented lower probing depth (p=0.0002). The model showed greater probing depth associated with proximal sites (p=0.008), bleeding on probing (p=0.0002) and presence of plaque (p=0.008). Multilevel analysis revealed that the highest percentage of variance associated with the site level, while the lowest level was related to the patient.
Keywords : Chronic periodontitis; multilevel analysis; probing depth.