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 | 0.0–10 (0.0–1.3) | 5.3 ± 1.9 (0.69 ± 0.35) | 100 | 34 | 40 | 100 | 0.73 (0.67–0.78) |
>1.3 (10 | 233 | 10.1–65.4 (1.4–8.7) | 19.5 ± 6.8 (2.59 ± 1.07) | ||||||
0–10 minute (average) | ≤1.7 (12.8) | 91 | 0.3–1.7 (2,5–12.8) | 0.99 ± 0.36 (7.5 ± 2.1) | 100 | 43 | 44 | 100 | 0.82 (0.78–0.87) |
>1.7 (12.8) | 213 | 1.8–4.8 (12.9–36.1) | 2.86 ± 0.76 (21.8 ± 5.2) | ||||||
10 minute | ≤1.6 (12.1) | 82 | 0.3–1.6 (2.3–12.1) | 1.04 ± 0.41 (7.6 ± 3.4) | 100 | 39 | 42 | 100 | 0.82 (0.78–0.87) |
>1.6 (12.1) | 222 | 1.7–5.8 (12.2–43.6) | 3.24 ± 0.93 (24.1 ± 7.1) | ||||||
11–15 minute (average) | ≤1.6 (12.1) | 93 | 0.4–1.6 (3.3–12.2) | 0.99 ± 0.28 (7.4 ± 2.3) | 100 | 44 | 45 | 100 | 0.78 (0.73–0.83) |
>1.6 (12.1) | 211 | 1.8–5.5 (12.3–41.4) | 3.22 ± 0.74 (24.4 ± 4.9) | ||||||
15 minute | ≤1.9 (14.3) | 94 | 0.2–1.9 (1.9–14.3) | 1.25 ± 0.41 (7.9 ± 2.9) | 100 | 45 | 45 | 100 | 0.78 (0.73–0.83) |
>1.9 (14.3) | 210 | 2.0–7.7 (14.4–57.9) | 3.73 ± 0.98 (27.8 ± 7.1) | ||||||
20 minute | ≤1.5 (11.3) | 93 | 0.3–1.5 (2.8–11.3) | 0.95 ± 0.26 (7.2 ± 2.1) | 100 | 44 | 45 | 100 | 0.78 (0.72–0.83) |
>1.5 (11.3) | 211 | 2.1–7.3 (11.4–54.9) | 4.33 ± 1.11 (32.3 ± 7.8) | ||||||
Max | ≤2.5 (18.8) | 89 | 0.7–2.5 (0.7–18.8) | 1.62 ± 0.39 (12.4 ± 3.3) | 100 | 42 | 44 | 100 | 0.81 (0.76–0.86) |
>2.5 (18.8) | 215 | 2.6–10.6 (18.9–79.7) | 5.3 ± 1.48 (39.9 ± 11.5) | ||||||
Final | ≤1.5 (11.3) | 93 | 0.3–1.5 (2.7–11.3) | 1.0 ± 0.32 (7.5 ± 3.1) | 100 | 44 | 45 | 100 | 0.78 (0.73–0.83) |
>1.5 (11.3) | 211 | 1.9–6.3 (11.4–47.4) | 3.69 ± 0.94 (27.8 ± 6.9) |