Median (IQR) heart rate (HR) per minute after birth of Leiden versus defined reference ranges
| Time after birth in minutes | Leiden (109 infants) | Defined reference ranges (308 infants) | p |
|---|---|---|---|
| HR (bpm) median (IQR) | HR (bpm) median (IQR) | ||
| 1 | 61 (42–146) | 80 (68–151) | ns |
| 2 | 85 (67–164) | 160 (102–173) | <0.001* |
| 3 | 157 (145–169) | 167 (152–185) | <0.001* |
| 4 | 152 (140–163) | 170 (157–182) | <0.001* |
| 5 | 150 (140–161) | 167 (153–179) | <0.001* |
| 6 | 149 (138–162) | 163 (153–178) | <0.001 |
| 7 | 152 (140–161) | 162 (150–177) | <0.001* |
| 8 | 147 (139–156) | 160 (134–173) | <0.001* |
| 9 | 149 (138–158) | 156 (145–173) | <0.001* |
| 10 | 146 (140–153) | 158 (144–174) | <0.001* |
*Means corrected for assumption equal variances.