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.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )