Table 1. Demographic characteristics of infants admitted to PICU, less than 1-year-old, and with bronchiolitis due to one virus or more than one virus.
| Characteristics | One virus ( n = 215) |
More than one virus ( n = 91) |
p -Value |
|---|---|---|---|
| Age (d) | |||
| Median (IQR) | 102 (44–226) | 111 (54–187) | 0.73 |
| Gender | |||
| Male | 56% (121/215) | 67% (61/91) | 0.10 |
| Female | 43% (94/215) | 33% (30/91) | |
| Gestational age at birth (wk) | |||
| Median (IQR) | 38 (36–39) | 37.8 (36–39) | 0.82 |
| Birth weight < 2.5 kg | |||
| < 2.5 kg | 17% (37/215) | 23% (21/91) | 0.26 |
| ≥ 2.5 kg | 83% (178/215) | 77% (70/91) | |
| Mode of delivery | |||
| Vaginal | 55% (118/215) | 49% (45/91) | 0.45 |
| Caesarean | 45% (97/215) | 51% (46/91) | |
| Breastfed at any time during life | |||
| Yes | 55% (90/163) | 62% (56/91) | 0.36 |
| No | 45% (73/163) | 38% (35/91) | |
| Immunizations up to date | |||
| Yes | 92% (188/205) | 98% (81/83) | 0.11 |
| No | 8% (17/205) | 2% (2/83) | |
| Congenital heart diseases | |||
| Yes | 4% (9/215) | 4% (4/91) | 1.00 |
| No | 96% (206/215) | 96% (87/91) | |
| Chronic lung diseases | |||
| Yes | 3% (7/215) | 0/91 | 0.11 |
| No | 97% (208/215) | 91/91 | |
| Length of illness at presentation | |||
| Median (IQR) | 3 (2–4) | 3 (2–4) | 0.84 |
Abbreviations: IQR, interquartile range; PICU, pediatric intensive care unit.