TABLE 1.

Demographic Characteristics and Medical History of Children With Bronchiolitis by Inpatient Apnea Status

Characteristics	n	No Apnea (n = 2048), %	Apnea (n = 108), %	P
History
Age, corrected for gestational age <37 wk				<.001
<2.0 wk	81	3	16
2.0–7.9 wk	531	23	46
2.0–5.9 mo	786	37	22
≥6.0 mo	758	36	16
Gender				.23
Male	1278	60	54
Female	878	40	46
Race				.77
White	1372	62	60
Nonwhite or missing	829	38	40
Hispanic	781	36	37	.86
Birth wt				.001
<2.3 kg (5 lb)	274	12	22
2.3–3.1 kg (5–6.9 lb)	747	35	41
≥3.2 kg (7 lb)	1110	53	36
Any comorbidity	454	21	19	.55
Breast fed	1303	61	56	.28
Attends day care	405	19	7	.001
Maternal smoking during pregnancy	325	15	20	.19
Secondhand smoke exposure	277	13	15	.54
Reported apnea	278	12	41	<.001
Time difficulty breathing began before preadmission visit				.53
None	47	2	2
<24 h	580	27	27
1–3 d	913	43	37
4–7 d	444	21	25
>7 d	143	7	9
Exposure to therapeutics within the week preceding the clinic visit
Bronchodilators	816	39	23	.001
Inhaled/nebulized steroids	170	8	8	.87
Systemic steroids	232	11	10	.90
Acetaminophen	1151	56	38	<.001
Antibiotics	414	20	11	.03