| Risk Factors | PICNIC Study (2004) [16] 33- 35 GA n=1758 | FLIP Study (2004) [48] 33- 35 GA n= 189 | FLIP- 2 Study (2008) [17] 33-35 GA n= 202 | Other Studies |
|---|---|---|---|---|
| Birth before or during RSV season | OR 4.88 (2.57-9.29); | Chronological age at start of RSV season ≤ 10 wk | Chronological age at start of RSV season ≤ 10 wk | Liese, et al. (2003) [25] |
| P= <0.001 | ||||
| OR 3.95 (2.65-5.90); | OR 2.99 (2.23-4.01); | |||
| P= 3.2*E-11 | P= 2.11*E-13 | |||
| Day care attendance/older siblings in school or day care | OR 12.32 (2.56-59.34); | School age siblings (≥ 1) | School age siblings or day care attendance | |
| P= 0.002 | ||||
| OR 2.85 (1.88-4.33); | OR 2.04 (1.53-2.74); | |||
| P= 9.4*E-7 | P= 1.47*E -6 | |||
| Lack of breast feeding | OR 1.75 (1.08-2.82); | Breast feeding ≤2 months | not significant | |
| P= 0.02 | OR 3.26 (1.96-5.42); | |||
| P= 5.5*E-6 | ||||