In this sample population consisting of individuals with dental plaque biofilm-induced gingivitis, GCF levels of MPO and BGD showed no significant association with clinical parameters (p > 0.05), while GCF level of NE was positively correlated with GI, BoP, and CAL (p < 0.05) but not with PI and PD (p > 0.05) (Table 4). This evidence concerns the gene MPO and gingivitis.