Dental fluorosis in populations from Chiang Mai, Thailand with different fluoride exposures - Paper 2: The ability of fluorescence imaging to detect differences in fluorosis prevalence and severity for different fluoride intakes from water

Table 2 Pairwise comparisons for water fluoride intervals from cooking water and Photographic TF scores, “convex hull” and Existing method outcomes

Photographic TF score Dependant variable water interval			Convex hull software Dependant variable water interval			Existing technique Dependant variable water interval
0	1	0.02	0	1	0.11	0	1	0.24
	2	<0.001*		2	0.004*		2	0.036
	3	<0.001*		3	<0.001*		3	<0.001*
	4	<0.001*		4	<0.001*		4	<0.001*
1	0	0.02	1	0	0.11	1	0	0.24
	2	0.11		2	0.18		2	0.34
	3	<0.001*		3	<0.001*		3	0.005*
	4	<0.001*		4	<0.001*		4	<0.001*
2	0	<0.001*	2	0	0.004*	2	0	0.036
	1	0.11		1	0.18		1	0.34
	3	0.049		3	0.016		3	0.076
	4	<0.001*		4	<0.001*		4	<0.001*
3	0	<0.001*	3	0	<0.001*	3	0	<0.001*
	1	<0.001*		1	<0.001*		1	0.005*
	2	0.049		2	0.016		2	0.076
	4	0.01		4	0.11		4	0.027
4	0	<0.001*	4	0	<0.001*	4	0	<0.001*
	1	<0.001*		1	<0.001*		1	<0.001*
	2	<0.001*	2		<0.001*		2	<0.001*
	3	0.01		3	0.11		3	0.076

* *difference considered significant at the 0.005 level.
Water Intervals: 0 = < 0.2 ppm, 1 = 0.20-0.59 ppm, 2 = 0.60-0.89 ppm, 3 = 0.90-1.59 ppm, 4 = 1.6 + ppm.

ISSN: 1472-6831