Table 2.
Patient Demographics and Baseline Characteristics Among Preterm Infants Born at 33 to 35 Completed Weeks’ Gestational Age With Subsequent Lower Respiratory Tract Infection/Respiratory Syncytial Virus Hospitalizations
| Characteristic | Seasons 1 and 2 (n = 105) | Seasons 3 and 4 (n = 130) |
|---|---|---|
| Male sex | 62 (59.0) | 73 (56.2) |
| Birth weight, mean (SD), g | 2363.5 (424.6) | 2341.1 (500.7) |
| Gestational age at birth, weeks’ gestational age | ||
| 33 0/7–33 6/7 | 20 (19.0) | 22 (16.9) |
| 34 0/7–34 6/7 | 34 (32.4) | 46 (35.4) |
| 35 0/7–35 6/7 | 51 (48.6) | 62 (47.7) |
| Singleton birth | 75 (71.4) | 85 (65.4) |
| Respiratory support needed during hospitalizationa | 37 (35.2) | 47 (36.2) |
| Length of stay, mean (SD), days | 13.5 (10.1) | 14.8 (10.7) |
| Birth month (November, December, January) | 30 (28.6) | 50 (38.5) |
| Moderate to high risk of respiratory syncytial virus severe diseaseb | 15/54 (27.8) | 26/62 (41.9) |
Values are presented as n (%) of patients unless otherwise noted.
Abbreviation: SD, standard deviation.
aDefined as invasive or noninvasive mechanical ventilation or high-flow air (>2 L/min) by nasal cannula/nasal prongs.
bCanadian respiratory syncytial virus risk scoring tool classification [12]. Among patients whose parent/guardian responded to a questionnaire: 54 of 105 infants in seasons 1/2 and 62 of 130 infants in seasons 3/4.