Table 2.

Proportions of Participants Having Various Characteristics Indicative of Level of Asthma Control (n = 519)

Asthma Control Criteria	No. (%)
Not well or very poorly controlled asthma: met one or more of the criteria below*	401 (77.3)
Asthma symptom-free days ≤ 10 within prior 2 wk†	200 (39.1)
Caregiver's sleep interrupted two or more times in past 4 wk due to child's asthma	188 (36.2)
Used rescue medication > 2 d in prior wk	149 (28.7)
Received two or more bursts of oral corticosteroids in the last yr‡	100 (20.4)
Normal activity in past 2 wk was somewhat or extremely limited§	232 (44.9)
FEV1 < 80% of predicted‖	65 (23.8)
FEV1/FVC < 80%‖	77 (28.0)

^*Asthma control criteria are based on Figures 4-3a and 4-3b in the National Asthma Education and Prevention Program expert panel report 3: guidelines for the diagnosis and management of asthma. Bethesda, MD: National Institutes of Health, 2007; publication No. 08-4051. Available at: http://www.nhlbi.nih.gov/guidelines/asthma/asthgdln.htm. Accessed December 15, 2007.

^†Data are missing for seven participants.

^‡Data are missing for 29 participants.

^§Data are missing for two participants.

^‖Valid prebronchodilator data were available only on 273 participants ≥ 5 yr of age.