Quantitative Light Fluorescence (QLF) and Polarized White Light (PWL) assessments of dental fluorosis in an epidemiological setting

Table 4 Automated evaluation results of the Quantitative Light Fluorescent (QLF) images for fluorosis compared to scores obtained from the Polarized White Light (PWL) images for the upper left central incisor

QLF METRIC (mean)	TF SCORE (PWL from Examiner 1)								Spearman’s rho	Kendall’s tau b
QLF METRIC (mean)	0	1	2	3	4	5	6	7	P < 0.001
% Area	17.20	16.50	22.89	30.10	44.12	49.67	42.31	42.71	.782	.644
Δ F	0.0530	0.0470	0.0560	0.0660	0.0950	0.1216	0.0843	0.0922	.738	.600
Δ Q	0.0125	0.0082	0.0135	0.0203	0.0468	0.0654	0.0371	0.0394	.780	.641
DEANS SCORE (PWL from Examiner 4)
	Normal	Questionable		Very Mild	Mild	Moderate		Severe
% Area	13.78	13.79		18.44	25.98	34.24		48.03	.873	.726
Δ F	0.0446	0.0418		0.0517	0.0606	0.0732		0.1106	.808	.656
Δ Q	0.0062	0.0061		0.0097	0.0164	0.0270		0.0590	.861	.713

ISSN: 1471-2458