Prevalence and extent of lifetime cumulative attachment loss (LCAL) at different thresholds and associations with clinical variables: changes in a population of young male military recruits over 3 years

Aim: The aims of this study were to monitor the prevalence and progression of lifetime cumulative attachment loss (LCAL) in a group of young British m ale military recruits over a 3-year period, and to determine the relationsh ip between signs of LCAL and selected periodontal variables. Methods: 100 subjects, aged 16-20 years (mean 17 years) at baseline. were e xamined at 0 (baseline), 12 and 30 months. LCAL, probing depth, plaque, ble eding on probing, gingival colour and supra- and subgingival calculus were assessed on the mesio-buccal, disto-buccal, mesio-lingual and disto-lingual surfaces of all teeth present, excluding third molars. Data were analysed cross-sectionally at each examination. Results: Over the period of the study, the prevalence of LCAL greater than or equal to1 and 2 mm ranged from 95-100%, whereas LCAL greater than or equ al to3 mm ranged from 40-47%. The extent of LCAL greater than or equal to1 mm ranged from 76-86%. However, the extent of LCAL greater than or equal to 2 mm was dramatically lower (10.5-12.7%), and LCAL greater than or equal to 3 mm was uncommon (0.5-0.9%). Examining the number of subjects according to the number of sites affected above a threshold, showed that a small number of subjects have a large number of sites above threshold. Using Pearson's rank correlation coefficient a significant correlation (p <0.05) was found between LCAL and the periodontal variables of gingival bleeding and supra- and subgingival calculus. Conclusions: These data suggest that the onset and progression of chronic p eriodontitis can be seen in young adults, and in this group gingival bleedi ng and supra- and subgingival calculus are the variables most strongly asso ciated with early periodontitis.