Table 1 Results of subgroup analysis
Subgroup | Â | Pooled survival (%) | 95% CI (%) |
|---|---|---|---|
Geographical region (p < 0.001) | Asia | 19.5 | 13.0 to 26.8 |
Europe and North America | 57.8 | 44.8 to 70.3 | |
Presence of CPR (p = 0.55) | CPR | Survival = 24.4% (21 of 86) | |
No CPR | Survival = 27.3% (54 of 144) | ||
LVEF (p = 0.09) |  < 20% | 62.0 | 51.6 to 72.1 |
20 to 35% | 42.3 | 6.70 to 82.8 | |
 > 35% | 32.1 | 8.70 to 60.7 | |
Serum lactate (p = 0.20) |  < 5 mmol/l | 50.5 | 29.8 to 71.2 |
 > 5 mmol/l | 32.2 | 16.2 to 50.7 | |