Table 5 Contingency table of subjects with and without fluorosis as determined by Δ Q (QLF) and photographic TF score
From: Evaluating the use of fluorescent imaging for the quantification of dental fluorosis
Condition | Manchester (869) | Newcastle (905) | χ2 chi square | |
|---|---|---|---|---|
Fluorosis ΔQ ch | No Fluorosis | 783 (90%) | 731 (81%) | χ2 (1)= 31.735, P<0.0001 |
Fluorosis | 86 (10%) | 172 (19%) | ||
Fluorosis photo | Fluorosis TF 0-2 | 863 (99%) | 843 (93%) | χ2 (1)= 45.640, P<0.0001 |
Fluorosis TF 3-5 | 6 (1%) | 62 (7%) |