title: Risk assessment for clinical attachment loss of periodontal tissue in Korean adults.
abstract: OBJECTIVE
  The purpose of this study was to assess the prevalence and extent of clinical attachment loss of periodontal tissue and to find out variables related to clinical attachment loss (CAL) in Korean adults older than 40 years of age.
  
  
  METHODS
  Data were collected from 2,519 subjects who were part of a cohort study conducted in Ansan city by Korea University Medical School for Korean Genome project. Age, sex, smoking, drinking, fast glucose, blood pressure, obesity and total cholesterol levels were examined. The oral examination included probing pocket depth, gingival recession and CAL of Ramford's teeth. The severity of periodontitis was classified based on the mean value of CAL. The relationship between each risk factor and the severity of CAL was independently estimated using the chi-square test, the test or one-way ANOVA. Multiple regression analysis was used to determine the significance of each factor in the periodontal disease.
  
  
  RESULTS
  The prevalences of clinical attachment between 1 and 3 mm, between 3 and < 5 mm, and ≥ 5 mm were 80.27%, 16.75% and < 1%, respectively. Although the univariate analysis showed age, gender, smoking, fasting glucose, blood pressure and total cholesterol levels were significantly related to the severity of CAL, multiple regression analysis indicated that age (P < .0001), gender (P < .0001) and smoking (P < .05) were only significantly related.
  
  
  CONCLUSIONS
  Older age, male gender and smoking were significant risk factor for the increase of CAL, and these may be useful indicators of periodontitis high-risk groups.
authors.affiliation: Department of Prosthodontics, Graduate School of Clinical Dentistry, Korea University, Seoul, Korea.
authors.forename: Gun-Bak
authors.initials: GB
authors.lastname: Rheu
authors.forename: Suk
authors.initials: S
authors.lastname: Ji
authors.forename: Jae-Jun
authors.initials: JJ
authors.lastname: Ryu
authors.forename: Jung-Bok
authors.initials: JB
authors.lastname: Lee
authors.forename: Chol
authors.initials: C
authors.lastname: Shin
authors.forename: Jeong Yol
authors.initials: JY
authors.lastname: Lee
authors.forename: Jung-Bo
authors.initials: JB
authors.lastname: Huh
authors.forename: Sang-Wan
authors.initials: SW
authors.lastname: Shin