Relationship of CO-Hb levels by DOL and BPD
| No to mild BPD (n=34) | Moderate to severe BPD (n=24) | P value | |
| CO-Hb at DOL 1–5 | 2.53± (0.47) | 2.66± (0.42) | 0.29 |
| CO-Hb at DOL 6–10 | 2.33± (0.46) | 2.43± (0.45) | 0.41 |
| CO-Hb at DOL 11–14 | 2.12± (0.48) | 2.36± (0.53) | 0.08 |
Numbers are expressed as mean± (SD).
BPD, bronchopulmonary dysplasia; CO-Hb, carboxyhemoglobin; DOL, day of life.