|
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)
| | | | | |
- 'Shockable' was defined as ventricular fibrillation or tachycardia. AUROC, area under the receiver operating characteristic curve; CI, confidence interval; CPR, cardiopulmonary resuscitation; NPV, negative predictive value; PetCO2, partial pressure of end-tidal carbon dioxide; PPV, positive predictive value; ROSC, restoration of spontaneous circulation; SD, standard deviation.
