Table 1.

Baseline Characteristics of the Participants.^*

Variable	Acetaminophen (N = 150)	Ibuprofen (N = 150)
Demographic characteristic
Age — mo	40.3±12.9	39.4±13.6
Male sex — no. (%)	86 (57)	93 (62)
Race or ethnic group — no. (%)†
White	74 (49)	74 (49)
Black	47 (31)	50 (33)
Hispanic or Latino	35 (23)	37 (25)
Age at onset of asthma — mo	13.1±9.4	13.1±10.9
Parent with history of asthma — no. (%)	87 (58)	91 (61)
Asthma measure at time of randomization
Oral glucocorticoid courses in the previous 6 months — no.	1.01±1.06	1.15±1.04
Urgent care or emergency department visits in the previous year — no.	3.13±2.45	2.96±2.29
Hospitalizations in the previous year — no.	0.29±0.57	0.26±0.51
Percentage of asthma-control days‡	85.5±18.7	85.6±16.2
Albuterol inhalations per week — no.	1.81±3.49	1.50±2.22
Use of inhaled glucocorticoids in the previous 12 months — no. of patients (%)	92 (61)	86 (57)
Use of leukotriene receptor antagonist in the previous 12 months — no. of patients (%)	22 (15)	39 (26)
Measure of atopy at time of randomization
Median IgE (interquartile range) — kU/liter	64 (19–176)	70 (24–252)
Median blood absolute eosinophil count (interquartile range) — cells/mm3	259.6 (172.5–524.8)	248.4 (132.8–450.0)
Positive aeroallergen test — no. of patients (%)	64 (43)	62 (41)

^*Plus–minus values are means ±SD. There were no significant differences between the two treatment groups in the characteristics listed.

^†Race or ethnic group was self-reported.

^‡Asthma-control days were defined as full calendar days without the use of rescue medications for asthma, daytime asthma symptoms, nocturnal asthma symptoms, and unscheduled health care visits for asthma.