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) | 97 | 0.0–1.3 (0.0–10) | 0.66 ± 0.32 (5.1 ± 2.3) | 100 | 40 | 57 | 100 | 0.61 (0.56–0.67) |
>1.3 (10) | 336 | 1.4–8.4 (10.1–63.2) | 4.17 ± 2.2 (30.8 ± 15.8) | ||||||
0–10 minute (average) | ≤1.6 (12.1) | 220 | 0.4–1.6 (3.4–12.1) | 0.97 ± 0.34 (7.3 ± 2.2) | 100 | 91 | 90 | 100 | 0.99 (0.98–0.99) |
>1.6 (12.1) | 213 | 1.7–5.6 (12.2–42.1) | 2.74 ± 0.87 (20.6 ± 6.7) | ||||||
10 minute | ≤1.3 (11) | 147 | 0.3–1.3 (3.6–11) | 0.86 ± 0.32 (6.9 ± 2.1) | 100 | 61 | 67 | 100 | 0.98 (0.97–0.99) |
>1.3 (11) | 286 | 1.4–7.2 (11.1–54.2) | 2.74 ± 1.14 (21.1 ± 7.9) | ||||||
11–15 minute (average) | ≤1.7 (12.8) | 240 | 0.4–1.7 (3.7–12.8) | 0.99 ± 0.31 (7.3 ± 2.6) | 100 | 99 | 99 | 100 | 1.00 (0.99–1.00) |
>1.7 (12.8) | 193 | 1.9–5.1 (12.9–38.4) | 3.15 ± 0.79 (24.1 ± 7.1) | ||||||
15 minute | ≤1.8 (13.5) | 236 | 0.3–1.8 (2.3–13.5) | 1.11 ± 0.39 (7.7 ± 3.3) | 100 | 98 | 97 | 100 | 0.99 (0.99–1.00) |
>1.8 (13.5) | 197 | 1.9–6.1 (13.6–45.9) | 3.58 ± 0.97 (27.1 ± 7.4) | ||||||
20 minute | ≤1.9 (14.3) | 242 | 0.3–1.9 (2.2–14.3) | 0.91 ± 0.29 (7.3 ± 2.4) | 100 | 100 | 100 | 100 | 1.00 (1.00–1.00) |
>1.9 (14.3) | 191 | 2.1–7.8 (14.4–58.7) | 4.38 ± 1.17 (33.1 ± 7.6) | ||||||
Max | ≤2.3 (17.3) | 210 | 0.8–2.3 (6.7–17.3) | 1.59 ± 0.35 (13.2 ± 3.4) | 100 | 87 | 86 | 100 | 1.00 (1.00–1.00) |
>2.3 (17.3) | 223 | 2.4–10.7 (17.4–80.5) | 5.0 ± 1.61 (37.6 ± 15.8) | ||||||
Final | ≤1.6 (12.3) | 239 | 0.2–1.6 (1.8–12.3) | 0.97 ± 0.33 (7.2 ± 2.8) | 100 | 99 | 98 | 100 | 1.00 (1.00–1.00) |
>1.6 (12.3) | 194 | 1.0–6.6 (12.4–49.6) | 3.59 ± 0.98 (27.1 ± 7.4) |