Fig 1. Receiver operating characteristic (ROC) curves for prediction of periodontal status using the total relative abundance of the SUBP bacteria in salivary microbiota.

Periodontal status was defined by the six criteria (≥1, ≥3, ≥5, ≥10, ≥15, and ≥30 sites with PD ≥4 mm), and depicted using different colors.