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

Table 4 Correlation coefficients of labial (buccal)/palatal (lingual) side of teeth 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
Labial (buccal)
QLF-D score	1
Δ R30	0.971^**	1
Δ R70	0.684^**	0.670^**	1
Δ R120	0.290	0.259	0.836^**	1
PHP	0.790^**	0.772^**	0.471^**	0.100	1
GI	0.776^**	0.787^**	0.414^*	0.015	0.770^**	1
BOP	0.756^**	0.768^**	0.392^*	−0.015	0.807^**	0.940^**	1
PD	0.621^**	0.632^**	0.339	0.031	0.570^**	0.768^**	0.757^**	1
Lingual (palatal)
QLF-D score	1
Δ R30	0.946^**	1
Δ R70	0.884^**	0.930^**	1
Δ R120	0.772^**	0.847^**	0.964^**	1
PHP	0.723^**	0.746^**	0.706^**	0.660^**	1
GI	0.702^**	0.682^**	0.613^**	0.525^**	0.794^**	1
BOP	0.685^**	0.648^**	0.608^**	0.517^**	0.706^**	0.906^**	1
PD	0.698^**	0.703^**	0.679^**	0.597^**	0.617^**	0.678^**	0.645^**	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