Dental Fluorosis according to Birth Cohort and Fluoride Markers in an Endemic Region of Colombia

Table 3

Fluoride concentration in the toenails by gender, age, and TFI score of the study children, 2018.

Variable	n (%)	μg F/g	values
Gender
Male	20 (54.0)	2.51 ± 2.23	0.989
Female	17 (46.0)	2.44 ± 2.25
Age (years)
8–12	16 (43.3)	1.67 ± 1.69	0.060
13–18	21 (56.7)	3.09 ± 2.52
TFI
TF ≤ 3	23 (62.2)	3.17 ± 2.40	0.015
TF ≥ 4	14 (37.8)	1.33 ± 1.56

Mean (SD) F = μg F/g (two measurements).