title: Prevalence and risk indicators for chronic periodontitis in adolescents and young adults in south Brazil.
abstract: OBJECTIVE
  To describe the distribution of clinical attachment loss (CAL) and to study risk indicators for chronic periodontitis in a large population-based sample of adolescents and young adults from south Brazil.
  
  
  METHODS
  This cross-sectional study used a subset of data from a larger survey representative of Porto Alegre, Brazil. The sample consisted of 612 individuals (291 males/321 females) aged 14-29 years. Full-mouth, six sites per tooth clinical examinations were performed by calibrated periodontists. Chronic periodontitis was defined as CAL 3mm affecting two or more teeth. Aggressive periodontitis cases were excluded from the analysis.
  
  
  RESULTS
  CAL 3 and 5mm affected 50.4% and 17.4% of subjects and 9.7% and 1.1% of teeth, respectively. Prevalence of chronic periodontitis ranged between 18.2% and 72.0% among subjects 14-19 and 24-29 years old, respectively. In the multivariable logistic regression analysis, older age [odds ratio (OR)=2.6, 95% confidence interval (CI)=1.7-3.9 and OR=7.2, 95% CI=3.7-14.0 for 20-24 and 25-29 years old, respectively], low socioeconomic status (OR=1.9, 95% CI=1.4-2.7), heavy smoking (OR=1.7, 95% CI=1.1-2.7) and larger amounts of calculus (OR=2.0, 95% CI=1.2-3.2) were significantly associated with chronic periodontitis.
  
  
  CONCLUSIONS
  This population of adolescents and young adults had a high prevalence of chronic periodontitis, and its presence was associated with age, socioeconomic status, smoking and calculus.
authors.affiliation: Department of Periodontics and Oral Biology, Medical College of Georgia School of Dentistry, Augusta, GA 30912, USA. csusin@mcg.edu
authors.forename: Cristiano
authors.initials: C
authors.lastname: Susin
authors.forename: Alex N
authors.initials: AN
authors.lastname: Haas
authors.forename: Patricia M
authors.initials: PM
authors.lastname: Valle
authors.forename: Rui V
authors.initials: RV
authors.lastname: Oppermann
authors.forename: Jasim M
authors.initials: JM
authors.lastname: Albandar
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001938:Brazil / Q000453:epidemiology; D055113:Chronic Periodontitis / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D003728:Dental Calculus / Q000453:epidemiology; D003729:Dental Care / Q000706:statistics & numerical data; D003773:Dental Plaque / Q000453:epidemiology; D004522:Educational Status; D005260:Female; D005884:Gingival Hemorrhage / Q000453:epidemiology; D006801:Humans; D008297:Male; D017622:Periodontal Attachment Loss / Q000453:epidemiology; D011159:Population Surveillance; D015995:Prevalence; D018570:Risk Assessment; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology; D012923:Social Class; D055815:Young Adult