Table 2. Demographic/characteristics of patients and providers.

Patient/provider characteristics	+Fluoride ( n  = 662, 21.7%)	–Fluoride ( n  = 2,387, 78.3%)	p -Value
Patient characteristics
WCC category % ( n )			<0.0001
• 12 months	22.8 (151)	13.3 (318)
• 15 mo	12.7 (84)	11.4 (271)
• 18 mo	19.8 (131)	13.8 (329)
• 24 mo	16.9 (112)	11.6 (277)
• 30 mo	7.4 (49)	4.9 (118)
• 36 mo	8.8 (58)	13.6 (324)
• 48 mo	8.0 (53)	17.2 (410)
• 60 mo	3.6 (24)	14.2 (340)
Sex % ( n ) female	42.2 (279)	44.3 (1,058)	0.32
Race and ethnicity % ( n )			0.66
• Asian
• Hispanic	1.1 (7)	0.7 (16)
• Non-Hispanic	12.4 (82)	12.3 (294)
• Black
• Hispanic	1.1 (7)	1.0 (24)
• Non-Hispanic	6.8 (45)	6.8 (163)
• White
• Hispanic	11.2 (74)	9.7 (231)
• Non-Hispanic	16.6 (110)	15.7 (375)
• Other race
• Hispanic	23.4 (155)	24.3 (580)
• Non-Hispanic	22.4 (148)	22.0 (526)
• Unknown/not reported
• Hispanic	4.8 (32)	7.1 (170)
• Non-Hispanic	0.3 (2)	0.3 (8)
Preferred language % ( n )			0.45
• English	88.8 (588)	87.6 (2,091)
• Spanish	9.4 (62)	9.8 (233)
• Other	1.8 (12)	2.6 (63)
Payor mix % ( n )			0.20
• Medicaid	49.4 (327)	53.1 (1,268)
• HMO	21.4 (142)	19.1 (456)
• PPO	29.2 (193)	27.8 (663)
No. of diagnoses % ( n )			< 0.0001
• 1–3	38.5 (255)	45.8 (1,093)
• 4–6	39.6 (262)	39.4 (940)
• 7–9	18.7 (124)	13.2 (314)
• 10+	3.2 (21)	1.7 (40)
Provider characteristics
Resident % ( n )	49.8 (330)	54.7 (1,306)	0.03
Sex % ( n ) female	67.8 (449)	65.6 (1,565)	0.28

Abbreviations: HMO, health maintenance organization; PPO, preferred provider organization; WCC, well-child check.

Note: n represents number of encounters. Pearson's chi-squared used as significance test.