Table 3.

Correlation coefficients (at subject level Pearson’s r and at site level the partial correlation coefficient) between the different plaque scoring methods *p < 0.001

	QLF-mQH		Combi-mQH		Blue-mQH
	Subject level	Site level	Subject level	Site level	Subject level	Site level
Combi-mQH	0.70*	0.50*	–	–	–	–
Blue-mQH	0.50*	0.30*	0.66*	0.39*	–	–
Clinical mQH	0.74*	0.48*	0.88*	0.70*	0.56*	0.26*