Table 1.

Demographic characteristics of the study population.

CHARACTERISTIC	AGE, y
	6	7	8	9	10	11	12	13	14	TOTAL
Participants, No.	18,613	19,503	20,228	20,485	20,751	20,758	20,550	20,555	20,122	181,565
Sex, No. (%)
Female	9,255 (49.7)	9,702 (49.8)	10,058 (49.7)	10,133 (49.5)	10,337 (49.8)	10,308 (49.7)	10,241 (49.8)	10,392 (50.6)	10,122 (50.30)	90,548 (49.9)
Male	9,351 (50.2)	9,796 (50.2)	10,163 (50.2)	10,346 (50.5)	10,392 (50.1)	10,429 (50.2)	10,274 (50.00)	10,130 (49.3)	9,956 (49.5)	90,837 (50.0)
Unknown	7 (0.04)	5 (0.03)	7 (0.03)	6 (0.03)	22 (0.1)	21 (0.10)	35 (0.2)	33 (0.2)	44 (0.2)	180 (0.10)
Race, No. (%)
White	8,269 (44.4)	8,816 (45.2)	9,270 (45.8)	9,537 (46.6)	9,759 (47.0)	9,995 (48.2)	10,038 (48.9)	10,169 (49.5)	10,112 (50.3)	85,965 (47.4)
Asian	1,372 (7.4)	1,352 (6.9)	1,342 (6.6)	1,306 (6.4)	1,270 (6.1)	1,249 (6.0)	1,175 (5.7)	1,140 (5.6)	1,100 (5.5)	11,306 (6.2)
Black	1,074 (5.8)	1,026 (5.3)	1,090 (5.4)	1,072 (5.2)	1,042 (5.0)	954 (4.6)	977 (4.8)	930 (4.5)	890 (4.4)	9,055 (5.0)
Hispanic	3,837 (20.6)	4,017 (20.6)	3,944 (19.5)	4,036 (19.7)	3,973 (19.2)	3,745 (18.0)	3,612 (17.6)	3,642 (17.7)	3,332 (16.6)	34,138 (18.8)
Native American	165 (0.9)	176 (0.9)	200 (1.0)	196 (0.9)	225 (1.1)	222 (1.1)	235 (1.1)	202 (0.9)	210 (1.0)	1,831 (1.0)
Native Hawaiian or Pacific Islander	176 (0.9)	193 (1.0)	211 (1.0)	194 (0.9)	205 (1.0)	194 (0.9)	179 (0.9)	178 (0.9)	192 (0.9)	1,722 (0.9)
Unknown	3,720 (20.0)	3,923 (20.1)	4,171 (20.6)	4,144 (20.2)	4,277 (20.6)	4,399 (21.2)	4,334 (21.1)	4,294 (20.9)	4,286 (21.30)	37,548 (20.7)
Elevated Caries Risk, No. (%)	9,603 (51.6)	10,728 (55.0)	11,428 (56.5)	11,252 (54.9)	10,245 (49.4)	9,235 (44.5)	8,391 (40.8)	8,477 (41.2)	8,690 (43.2)	88,049 (48.5)