Composition Analysis and Feature Selection of the Oral Microbiota Associated with Periodontal Disease

Table 1

Clinical characteristics of studied subjects. Clinical attachment loss and probing depth were measured in mm and represent the mean for all collected sites in the oral cavity of studied subjects.

Characteristics	Healthy	Moderate periodontitis	Severe periodontitis
Probing depth (mean ± s.d.)	1.3 ± 0.6	5.0 ± 1.3	7.9 ± 0.7
Clinical attachment loss (mean ± s.d.)	1.6 ± 0.7	5.7 ± 1.5	8.6 ± 1.1
% sites with bleeding on probing (mean ± s.d.)	2.8 ± 1.8	68.3 ± 23.2	79.7 ± 17.5