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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

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

QLF METRIC (mean) TF SCORE (PWL from Examiner 1) Spearman’s rho Kendall’s tau b
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