Risk factors for RSV related hospitalisation among preterm (⩽36 weeks gestation) infants under 6 months of age at the onset of each RSV season (1 November) 1996–99
| n | RSV related hospitalisation, n (%) | |
|---|---|---|
| *p<0.05. | ||
| Overall | 436 | 30 (6.9) |
| Gestation | ||
| 24–32 weeks | 120 | 9 |
| 33–36 weeks | 316 | 21 |
| Birth weight | ||
| ⩽1500 g | 83 | 6 |
| >1500 g | 353 | 24 |
| Sex | ||
| Male | 229 | 13 (5.7) |
| Female | 207 | 17 (8.3) |
| Multiple gestation | ||
| Singleton | 355 | 23 (6.5) |
| Multiple | 81 | 7 (8.6) |
| Assisted ventilation* | ||
| Yes | 111 | 14 (12.6) |
| No | 325 | 16 (4.9) |
| Oxygen therapy | ||
| ⩾28 days | 43 | 4 (9.5) |
| <28 days | 393 | 26 (6.6) |
| Oxygen dependency at 36 weeks of post-menstrual age* | ||
| Yes | 28 | 3 (10.7) |
| No | 408 | 27 (6.6) |
| Steroids for chronic lung disease* | ||
| Yes | 34 | 3 (9.1) |
| No | 402 | 27 (6.7) |
| Home oxygen therapy* | ||
| Yes | 11 | 3 (27.3) |
| No | 425 | 27 (6.4) |
| Discharge from neonatal unit | ||
| May–October | 388 | 27 (7.0) |
| November–April | 48 | 3 (6.4) |