| Clinical parameters | Unfavorable prognosis |
| Duration of anoxia | >8-10 minutes |
| Duration of CPR | >30 minutes |
| Pupillary light reaction | Absent on day 3 |
| Motor response to pain | Absent on day 3 |
| Brainstem reflexes | Absent |
| Blood glucose on admission | >300 mg/dL |
| Glasgow coma score on day 3 | <5 |
| GPCS on day 3 | <22 |
