Table IV.
Subgroup analysis of primary outcome in 3 cohorts
| Parameter | IMV | 32–34+6, No. (Total, %) | ≤ 32 weeks, No. (Total, %) |
|---|---|---|---|
| NHFOV | 13 (10.3) | 2 (24, 8.3%) | 11 (102, 10.8%) |
| NIPPV | 27 (21.4) | 5 (28, 17.9%) | 22 (98, 22.4%) |
| P 1 | 0.016 | 0.316 | 0.026 |
| OR | 2.371 | 2.391 | 2.395 |
| 95% CI | 1.160–4.844 | 0.419–13.636 | 1.092–5.251 |
| NHFOV | 9 (9.4) | 2 (17, 11.8%) | 7 (79, 8.9%) |
| NCPAP | 20 (20.8) | 5 (22, 22.7%) | 15 (74, 20.3%) |
| P 2 | 0.027 | 0.376 | 0.044 |
| OR | 2.544 | 2.206 | 2.615 |
| 95% CI | 1.093–5.921 | 0.372–13.090 | 1.00–6.836 |
| NIPPV | 25 (18.9) | 4 (36, 11.1%) | 21 (98,21.4%) |
| NCPAP | 25 (18.7) | 8 (33, 24.2%) | 17 (101, 16.8%) |
| P 3 | 1.00 | 0.151 | 0.409 |
| OR | 1.00 | 2.560 | 0.742 |
| 95% CI | 0.541–1.849 | 0.691–9.481 | 0.365–1.510 |
IMV – invasive mechanical ventilation, OR – odds ratio, 95% CI – 95% confidence interval. P1 – p-value of NHFOV vs. NIPPV, P2 – p-value of NHFOV vs. NCPAP, P3 – p-value of NIPPV vs. NCPAP.