Table 1.
Inpatient bronchiolitis (n=671) |
No inpatient bronchiolitis (n=682) |
p-value | |||
---|---|---|---|---|---|
n | % | n | % | ||
Maternal prenatal smoking | 0.10 | ||||
No | 628 | 94 | 651 | 96 | |
Yes | 42 | 6 | 29 | 4 | |
Postnatal smoke exposure | <0.001 | ||||
No | 437 | 65 | 369 | 54 | |
Yes | 113 | 17 | 22 | 3 | |
Unknown | 121 | 18 | 291 | 43 | |
Infant’s age at diagnosis in days, median (IQR) | 671 | 108 (47-205) | – | – | – |
Sex | 0.06 | ||||
Male | 400 | 60 | 372 | 55 | |
Female | 271 | 40 | 310 | 45 | |
Race | <0.001 | ||||
White | 272 | 41 | 358 | 52 | |
Black | 33 | 5 | 33 | 5 | |
Other | 288 | 43 | 243 | 36 | |
Unknown | 78 | 12 | 48 | 7 | |
Ethnicity | <0.001 | ||||
Hispanic | 280 | 42 | 194 | 28 | |
Non-Hispanic | 320 | 48 | 448 | 66 | |
Unknown | 71 | 11 | 40 | 6 | |
Mother’s education | <0.001 | ||||
< 12 years | 204 | 30 | 115 | 17 | |
≥ 12 years | 467 | 70 | 567 | 83 | |
Older sibling present in home | <0.001 | ||||
No sibling | 222 | 33 | 316 | 46 | |
1 sibling | 234 | 35 | 222 | 33 | |
> 1 sibling | 213 | 32 | 144 | 21 | |
Congenital heart disease | <0.001 | ||||
No | 558 | 83 | 513 | 75 | |
Yes | 19 | 3 | 7 | 1 | |
Unknown | 94 | 14 | 162 | 24 | |
Maternal asthma status | 0.22 | ||||
No | 512 | 76 | 509 | 75 | |
Yes | 51 | 8 | 42 | 6 | |
Unknown | 108 | 16 | 131 | 19 | |
Mother’s age at delivery in years, median (IQR) | 671 | 29 (23-33) | 682 | 31 (25-35) | <0.001 |
Method of Delivery | 0.001 | ||||
Vaginal | 455 | 68 | 468 | 69 | |
Primary c section | 105 | 16 | 145 | 21 | |
Repeat c section | 102 | 15 | 63 | 9 | |
Unknown | 9 | 1 | 6 | 1 | |
Gestational age | <0.001 | ||||
≥ 37 | 535 | 80 | 601 | 88 | |
32 - 36 | 91 | 14 | 66 | 10 | |
< 32 | 41 | 6 | 13 | 2 | |
Breastfeeding at discharge | 0.13 | ||||
Yes | 591 | 88 | 619 | 91 | |
No | 79 | 12 | 63 | 9 | |
Atopic dermatitis during infancy | <0.001 | ||||
No | 520 | 78 | 482 | 71 | |
Yes | 57 | 8 | 38 | 6 | |
Unknown | 94 | 14 | 162 | 24 |
Percentage totals may not equal 100% because of rounding.
Abbreviations: IQR, Inter quartile range