Comparison of different data analyses for detecting changes in attachment level

DOI Web Site Web Site 被引用文献15件

抄録

<jats:p><jats:bold>Abstract</jats:bold> The purpose of the present investigation was to evaluate methods to detect periods of destructive periodontal disease activity in individual sites using pairs of repeated attachment level measurements. Attachment level measurements were made at 6 sites on every tooth in 22 individuals with radiographie evidence of periodontal destruction, and were repeated within 7 days. A total of 3414 sites were monitored at 2‐month intervals for approximately 1 year. 3 analytical procedures were used to test for significant changes in attachment level. For <jats:italic>regression analysis</jats:italic>, a linear least squares fit function of time in days vs attachment level was computed for each site and the slope tested for difference from 0. <jats:italic>Running medians</jats:italic> of 3 were used to smooth attachment level measurements and changes > 2 mm in the smoothed curves were considered significant. By the <jats:italic>tolerance method</jats:italic> diferences between pairs of attachment level measurements were used to compare the mean change and the site specific variability of that change. The proportion of specific agreement (Ps) for breaking down sites was highest between the tolerance and running median methods (Ps = 0.63). Overall agreement (kappa), which included sites which showed “loss”, “gain”, and no change was 0.56. By regression analysis (<jats:italic>P</jats:italic> < 0.01). 175 sites were identified as having significant attachment loss and 79 sites were identified as improving. By running medians these figures were 90 and 50. and by tolerance 94 and 40, respectively.</jats:p><jats:p>Each of the 3 methods had certain advantages. Regression analysis was particularly sensitive to gradual changes in slope whereas the running median method detecting abrupt changes in attachment level. The tolerance method was well suited to detecting changes over a short period of time. The tolerance and running median methods detected more breaking down sites on the molars and tower incisors and on interproximal surfaces: whereas regression analysis did not show these differences.</jats:p>

収録刊行物

被引用文献 (15)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ