Table 4—
Sensitivity and specificity to a given measurement of end-tidal carbon dioxide tension (
P
ET,CO
2
)
Mean
P
ET,CO
2
, positive if <x
Sensitivity %
Specificity %
26
15.4
94.4
28
30.8
86.3
30
43.6
80.0
32
61.5
72.6
34
74.4
64.8
36
87.2
53.0
38
92.3
33.3
40
94.9
19.6