Cluster analysis of CP subjects.

NS�Cnot significantSubjects were clustered by K-means clustering and differences sought in means (��S.D.) of variables by ANOVA. PD and AL measured in mm; GI is the % sites with gingival redness. Antibody values are expressed in ELISA units.

无统计学意义（NS，not significant）。研究对象通过K均值聚类（K-means clustering）进行分组，随后采用方差分析（ANOVA）探究各变量的均值（±标准差，S.D.）差异。探诊深度（PD，Probing Depth）与附着丧失（AL，Attachment Loss）的计量单位为毫米（mm）；牙龈指数（GI）指存在牙龈发红的位点百分比。抗体值以酶联免疫吸附试验（ELISA）单位表示。