| Background EEG activity | Therapeutic hypothermia | Rewarming | |||||||||
| Cold induction phase | Cold maintenance phase | End of the cold phase | |||||||||
| Grade 2 HIE n (%) | Grade 3 HIE n (%) | Grade 1 HIE n (%) | Grade 2 HIE n (%) | Grade 3 HIE n (%) | Grade 1 HIE n (%) | Grade 2 HIE n (%) | Grade 3 HIE n (%) | Grade 1 HIE n (%) | Grade 2 HIE n (%) | Grade 3 HIE n (%) | |
| Subnormal activity | - | - | 2 (5.6) | - | - | 4 (11.1) | - | - | 6 (16.6) | - | - |
| Hyperactive rapid activity | 10 (27.8) | - | - | 12 (33.3) | - | - | 13 (36.1) | - | - | 15 (41.7) | - |
| Pathologic slow activity | 8 (22.2) | - |
| 6 (16.7) |
|
| 4 (11.1) |
|
| 2 (5.6) |
|
| Discontinuous type A activity | 11 (30.5) | - | - | 9 (25) | - | - | 8 (22.2) | - | - | 6 (16.6) | - |
| Discontinuous type B activity | 2 (5.6) | - | - | - | - | - | - | - | - | - | - |
| Paroxysmal activity | - | 2 (5.6) | - | - | 4 (11.1) | - | - | 2 (5.6) | - | - | 2 (5.6) |
| Low-voltage plus theta activity | - | 3 (8.3) | - | - | 3 (8.3) | - | - | 5 (13.9) | - | - | 5 (13.9) |