Table I.

Demographic variables by treatment group (N=60). Data are number (%), unless otherwise indicated.

	Ibuprofen Alone (n = 20)	Ibuprofen + Acetaminophen (n = 20)	Ibuprofen Followed by Acetaminophen (n =20)	P
Age, mean (SD), y	3.2 (1.9)	3.0 (1.9)	4.0 (2.8)	0.35
Age distribution				0.94
<3 y	11 (55)	11 (55)	10 (50)
≥3 y	9 (45)	9 (45)	10 (50)
Sex				0.28
Female	8 (40)	10 (50)	13 (65)
Male	12 (60)	10 (50)	7 (35)
Race/ethnicity				0.59
White, non-Hispanic	18 (90)	15 (75)	16 (80)
Other	2 (10)	5 (25)	4 (20)
Weight, mean (SD), kg	15.3 (6.4)	13.6 (4.3)	16.8 (6.8)	0.26