TABLE 1—

Prevalence of Respiratory Symptoms and Other Conditions

Term	Description	Frequency, %
Ever asthma	Ever told by doctor that child has asthma	1.9
Current asthma	Doctor-diagnosed asthma with parental reporting of shortness of breath or wheeze, or use of asthma medication within past 12 months	1.5
Severe asthma	Hospitalization for asthma/regular medication for asthma within past 12 months	0.8
Ever wheeze	Wheezing heard from distance without a cold	3.1
Current wheeze	Wheezing heard from distance with or without a cold, shortness of breath with wheezing, awakening at night by wheezing, with exercise, or use of medication or hospitalization within pastwheezing 12 months for wheezing	13.4
Current severe wheeze	Wheezing heard from a distance for ≥ 3 consecutive days, hospitalization or medication use for asthma within past 12 months	10.1
Current asthma-like symptoms	Asthma symptoms or asthma medication use, awakening by asthma, wheezing upon exercise, or hospital care for wheezing within past 12 months	10.3
Severe asthma-like symptoms	Current asthma-like symptoms with routine medication use within past 12 months	2.2
Ever cough	Usual cough day or night	25.7
Persistent cough	Cough ≥ 3 consecutive months within past 12 months	5.5
Ever phlegm	Wet cough or phlegm produced without a cold	7.0
Persistent phlegm	Wet cough or phlegm ≥ 3 consecutive months within past 12 months	1.5
Dry cough	Ever cough without phlegm	17.8
Persistent dry cough	Persistent cough without phlegm for ≥ 3 consecutive months within past 12 months	3.6
Upper respiratory infection	Acute upper respiratory infection within past 12 months	76.9
Severe upper respiratory infection	Two or more acute upper respiratory infections within past 12 months	24.2
Current bronchitis	Doctor-diagnosed bronchitis within past 12 months	8.3
Any allergy	Doctor-diagnosed allergy, reported hay fever, or pollenosis	33.2
Respiratory allergy	Hay fever or doctor-diagnosed allergies to airborne substances (e.g., dust, animals, molds, pollens, air pollution, environmental tobacco smoke)	8.0
Eye irritation	Eye irritation sometimes	20.8