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Table 7 Performance of various values of PetCO2 and duration of CPR for prediction of ROSC in patients with shockable initial rhythm in cardiac arrest
| PetCO2 | Cut-off (kPa [mmHg]) | n | Min-max (kPa [mmHg]) | Mean ± SD (kPa [mmHg]) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | AUROC (95% CI) |
|---|---|---|---|---|---|---|---|---|---|
| Initial | ≤1.3 (10) | 71 | 0.0–1.3 (0.0–10) | 0.69 ± 0.3 (5.2 ± 2.6) | 100 | 76 | 91 | 100 | 0.93 (0.86–0.97) |
| >1.3 (10) | 233 | 1.4–8.7 (10.1–65.4) | 2.59 ± 1.08 (19.6 ± 8.3) | ||||||
| 0–10 minute (average) | ≤1.6 (12.1) | 86 | 0.3–1.6 (2.8–12.1) | 0.96 ± 0.33 (7.22 ± 3.1) | 100 | 92 | 97 | 100 | 0.99 (0.99–1.00) |
| >1.6 (12.1) | 218 | 1.7–4.8 (12.2–39.1) | 2.83 ± 0.77 (21.1 ± 5.8) | ||||||
| 10 minute | ≤1.5 (11.3) | 72 | 0.3–1.5 (2.6–11.3) | 0.96 ± 0.37 (7.2 ± 2.9) | 100 | 77 | 91 | 100 | 0.99 (0.98–0.99) |
| >1.5 (11.3) | 232 | 1.6–5.8 (11.4–43.6) | 3.17 ± 0.96 (24.1 ± 7.3) | ||||||
| 11–15 minute (average) | ≤1.6 (12.1) | 93 | 0.4–1.6 (3.7–12.1) | 0.99 ± 0.28 (7.5 ± 2.1) | 100 | 100 | 100 | 100 | 1.00 (1.00–1.00) |
| >1.6 (12.1) | 211 | 1.8–5.5 (13.5–41.4) | 3.22 ± 0.74 (24.1 ± 8.3) | ||||||
| 15 minute | ≤1.8 (13.5) | 92 | 0.2–1.8 (1.6–13.5) | 1.11 ± 0.39 (7.9 ± 2.9) | 100 | 99 | 100 | 100 | 1.00 (1.00–1.00) |
| >1.8 (13.5) | 212 | 1.9–7.7 (13.6–59.3) | 3.71 ± 0.99 (27.8 ± 7.3) | ||||||
| 20 minute | ≤1.5 (11.3) | 93 | 0.3–1.5 (2.8–11.3) | 0.95 ± 0.26 (7.3 ± 2.2) | 100 | 100 | 100 | 100 | 1.00 (1.00–1.00) |
| >1.5 (11.3) | 211 | 2.1–7.3 (11.4–54.9) | 4.33 ± 1.11 (32.3 ± 7.9) | ||||||
| Max | ≤2.3 (17.3) | 83 | 0.7–2.3 (5.26–17.3) | 1.56 ± 0.34 (13.2 ± 3.4) | 100 | 89 | 95 | 100 | 0.99 (0.90–1.00) |
| >2.3 (17.3) | 221 | 2.4–10.6 (17.4–79.7) | 5.23 ± 1.5 (39.2 ± 11.3) | ||||||
| Final | ≤1.5 (11.3) | 93 | 0.3–1.5 (2.6–11.3 | 1.0 ± 0.32 (7.5 ± 1.9) | 100 | 100 | 100 | 100 | 1.00 (1.00–1.00) |
| >1.5 (11.3) | 211 | 1.9–6.3 (11.3–47.4) | 3.69 ± 0.94 (27.8 ± 7.1) |
