Characteristics of neonates in phase 2 and 3 of the study
| Characteristics | Phase 2 | Phase 3 |
| Number of neonates | 33 | 98 |
| Number of recordings | 69 | 235 |
| In need of PPV | No | Yes |
| Apgar 1 min | 9 (IQR 9–9) | 3 (IQR 2–4) |
| Apgar 5 min | 9 (IQR 9–10) | 5 (IQR 4–6) |
| Median weight (g) | 3000 (IQR 2700–3390) | 3100 (IQR 2750–3400) |
| Time of HR assessment after birth (s) | 120–1800 (median 300, IQR 180–600) | ~100–720* |
*Exact data on time for measurements not possible to obtain through the method used in phase 3.
HR, heart rate; PPV, positive pressure ventilation.