Early study of periodontal research found a close association between age periodontal disease and tooth loss. But the data were aggregated and cross-sectional. Recent research has questioned the association between age and periodontitis. The small proportion with severe disease in the older age was only slightly higher than in the younger. Piedmont study in North Carolina LPA was more extensive in persons aged 65 or older.
Age is a risk indicator in cross-sectional studies or a predictor in longitudinal studies.
But reported by Halling and Bjorn found that radiographic bone loss was slightly less in older women than in middle-aged women during the 12 years study in Swedish women. Hunt, in a 18-month Iowa Rural Health study reported that periodontal conditions were weak predictors of tooth loss. This group had no dental treatment. Christersson studied 508 adults in N.Y. age was correlated with supragingival plaque but less related than gender, race or presence of periodontitis. No correlated with subgingival calculus.