Table 2.
Comparisons of predictor variables and event rates between the study sample and the PROLOGUE derivation sample.
| Study Sample (N = 1051) |
PROLOGUE Sample (N = 671) |
p-Value | |
|---|---|---|---|
| Predictor Variables | |||
| Age, years; mean (SD) | 61 (16) | 61 (16) | 1 |
| GCS motor score; mean (SD) | 1 (1) | 2.5 (2) | <0.001 |
| Adrenaline, mg; mean (SD) | 3 (3) | 2 (2.5) | <0.001 |
| Low-flow time, min; mean (SD) | 19 (20) | 20 (14) | 0.2584 |
| Creatinine, mg/dL; mean (SD) | 1.24 (0.41) | 1.25 (0.52) | 0.6573 |
| Potassium, mmol/L; mean (SD) | 3.93 (0.70) | 4.2 (0.92) | <0.001 |
| Phosphate, mg/dL; mean (SD) | 5.98 (3.0) | 6.0 (2.14) | 0.8808 |
| Hemoglobin, g/dL; mean (SD) | 13.5 (2.07) | 12.7 (2.66) | <0.001 |
| Lactate, mmol/L; mean (SD) | 6.9 (4.74) | 9.45 (4.51) | <0.001 |
| Witnessed collapse, n (%) | 921 (88) | 460 (69) | <0.001 |
| Shockable rhythm, n (%) | 593 (56) | 203 (30) | <0.001 |
| Reactive pupillary reflex, n (%) | 503 (48) | 367 (55) | 0.0065 |
| Poor Outcome (CPC 3–5); n (%) | 578 (55) # | 443 (66) + | <0.001 |
# 30 days after return of spontaneous resuscitation; + at hospital discharge. Abbreviations: CPC, Cerebral Performance Category; GCS, Glasgow Coma Scale.