Table 4.
Use of Respiratory Support in Lower Respiratory Tract Infection/Respiratory Syncytial Virus Hospitalizations Among Preterm Infants Born at 33 to 35 Completed Weeks’ Gestational Age
| Characteristic | All Lower Respiratory Tract Infection/Respiratory Syncytial Virus Hospitalizations | Known Moderate/High Riska | ||
|---|---|---|---|---|
| Seasons 1 and 2 (n = 105) | Seasons 3 and 4 (n = 130) | Seasons 1 and 2 (n = 15) | Seasons 3 and 4 (n = 26) | |
| Respiratory support neededb | 43 (41.0) | 46 (35.4) | 9 (60.0) | 14 (53.8) |
| Conventional mechanical ventilation | 13 (12.4) | 13 (10.0) | 3 (20.0) | 4 (15.4) |
| Mean number of days | 4.8 | 6.1 | 2.7 | 7.0 |
| CPAP (invasive) | 3 (2.9) | 3 (2.3) | 1 (6.7) | – |
| Mean number of days | 1.7 | 1.3 | 2.0 | … |
| CPAP (noninvasive) | 10 (9.5) | 15 (11.5) | 6 (23.1) | 8 (19.5) |
| Mean number of days | 3.1 | 5.3 | 8.0 | 3.5 |
| High-frequency oscillatory ventilation | 0 | 3 (2.3) | 0 | 1 (3.8) |
| Mean number of days | … | 3.0 | … | 2.0 |
| High-flow air | 10 (9.5) | 19 (14.6) | 0 | 4 (15.4) |
| Mean number of days | 2.0 | 2.2 | … | 1.8 |
| Other (not intubated) | 24 (22.9) | 24 (18.5) | 7 (46.7) | 12 (46.2) |
| Mean number of days | 3.3 | 3.6 | 3.0 | 4.7 |
| Oxygen supplementation needed | 52 (49.5) | 69 (53.1) | 10 (66.7) | 17 (65.4) |
| Mean number of days | 4.0 | 4.4 | 4.4 | 6.4 |
All values are presented as n (%) of patients unless otherwise noted.
Abbreviation: CPAP, continuous positive airway pressure.
aCanadian respiratory syncytial virus risk scoring tool classification [12]. Classification performed 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. All other data are from the patients’ hospitalization records.
bDefined as invasive or noninvasive mechanical ventilation or high-flow air (>2 L/min) by nasal cannula/nasal prongs.