Table 1.

Characteristics of the Subjects and Families (N=376).

Characteristics	Percentage
Adolescent’s gender Male Female	55 45
Mother’s race White (non-Hispanic) Black Asian White (Hispanic)	97 0.8 0.5 1
Educational level (2007) No Response Some High School H.S. diploma/G.E.D Some college 2-year college degree 4-year college degree Graduate/professional degree	Mother 1 1 13 20 20 27 18	Father 10 2 23 15 15 20 15
Family income (2007) No response <$20,000 $20,000–$39,999 $40,000–$59,999 $60,000–$79,999 $80,000 or more	15 3 12 16 18 36
Parent filling out questionnaire Mother Father Unknown	89 10 0.5
Max. FRI score on maxillary incisors/canines FRI=0,1 FRI=2 FRI=3	74 25 1
Number of surface zones with fluorosis 0 1–4 5–24	74 19 7
Number of missing teeth 0 1–4 5–13	64 27 9
Anterior crossbite Posterior crossbite ≥4mm overjet Open bite	7 7 6 4