Figure 3

Significant and positive correlations between the levels of either chondroitin sulfate (CS) or alkaline phosphatase (ALP) and four clinical parameters. The CS levels in ng/ml (A, B, C, D) or the ALP levels in ng/ml (E, F, G, H) were associated with four periodontal parameters, including probing depth (PD) in mm (A and E), loss of clinical attachment levels (CAL) in mm (B and F), gingival index (GI; C and G) and plaque index (PI; D and H). Note stronger correlations were found between CS levels and all four clinical parameters than between ALP levels and these parameters.