Validity assessment of quantitative light-induced fluorescence-digital (QLF-D) for the dental plaque scoring system: a cross-sectional study

Table 5 Correlation coefficients of maxilla/mandible among the QLF-D scores, PHP score, GI scores, BOP score and PD scores (N = 33)

	QLF-D score	Δ R30	Δ R70	Δ R120	PHP	GI	BOP	PD
Maxilla
QLF-D score	1
Δ R30	0.954^**	1
Δ R70	0.644^**	0.629^**	1
Δ R120	0.350^*	0.302	0.878^**	1
PHP	0.737^**	0.745^**	0.373^*	0.136	1
GI	0.647^**	0.685^**	0.228	−0.022	0.723^**	1
BOP	0.614^**	0.677^**	0.227	−0.042	0.725^**	0.946^**	1
PD	0.565^**	0.516^**	0.252	0.071	0.440^*	0.695^**	0.637^**	1
Mandible
QLF-D score	1
Δ R30	0.931^**	1
Δ R70	0.838^**	0.904^**	1
Δ R120	0.703^**	0.772^**	0.948^**	1
PHP	0.794^**	0.751^**	0.679^**	0.601^**	1
GI	0.771^**	0.762^**	0.664^**	0.560^**	0.834^**	1
BOP	0.779^**	0.766^**	0.700^**	0.610^**	0.830^**	0.948^**	1
PD	0.583^**	0.650^**	0.621^**	0.567^**	0.610^**	0.731^**	0.726^**	1

QLF-D Quantitative Light-Induced Fluorescence-Digital, QLF-D ⊿R score redness differences of 30, 70, and 120% between the teeth and the red plaque observed on the QLF-D photograph, PHP index Patient hygiene performance index, GI: Gingival index, BOP Bleeding on probing, PPD Probing pocket depth
^*P < 0.05
^**P < 0.01

ISSN: 1472-6831