|
Variables
|
Total
|
Derivation group
|
Validation group
|
P-value
|
|---|
|
Age Mean ± SD
|
70.17 ± 12.17
|
69.21 ± 12.18
|
70.64 ± 12.16
|
0.20
|
|
Sex, Female (%)
|
270 (50.7)
|
90 (51.4)
|
180 (50.3)
|
0.80
|
|
DoI, hours Mean ± SD
|
49.14 ± 27.63
|
47.12 ± 29.07
|
50.12 ± 26.88
|
0.24
|
|
PAO2 Mean ± SD
|
228.54 ± 24.30
|
225.83 ± 23.17
|
229.86 ± 24.75
|
0.07
|
|
PaO2 Mean ± SD
|
94.15 ± 3.30
|
93.21 ± 3.89
|
94.62 ± 2.87
|
0.20
|
|
SPO2 Mean ± SD
|
94.13 ± 1.69
|
94.05 ± 1.60
|
94.17 ± 1.75
|
0.46
|
|
pH Mean ± SD
|
7.41 ± 0.06
|
7.40 ± 0.06
|
7.42 ± 0.06
|
0.07
|
|
PaCO2 Mean ± SD
|
45.41 ± 3.77
|
44.71 ± 4.36
|
45.75 ± 3.39
|
0.09
|
|
FiO2 Mean ± SD
|
27.61 ± 2.85
|
27.6 ± 3.12
|
27.61 ± 2.72
|
0.96
|
|
Hgb Mean ± SD
|
11.19 ± 1.52
|
10.86 ± 1.63
|
11.35 ± 1.43
|
< 0.001
|
|
P/F Mean ± SD
|
344.76 ± 38.28
|
342.09 ± 41.79
|
346.07 ± 36.42
|
0.26
|
|
PA/F Mean ± SD
|
837.19 ± 126.70
|
828.94 ± 127.32
|
841.23 ± 126.37
|
0.29
|
|
S/F Mean ± SD
|
344.39 ± 34.16
|
344.78 ± 36.22
|
384.00 ± 33.21
|
0.856
|
|
OI Mean ± SD
|
4258.47 ± 809.76
|
4281.55 ± 765.33
|
4247.19 ± 831.42
|
0.65
|
|
OSI Mean ± SD
|
4254.35 ± 796.11
|
4230.81 ± 703.39
|
4265.86 ± 838.41
|
0.63
|
|
Survival, alive n (%)
|
446 (83.7)
|
150 (85.7)
|
296 (82.7)
|
0.37
|
- DoI means duration of intubation; PAO2 means partial pressure of O2 in alveoli; PaO2means partial pressure of O2 in arterial blood; SpO2 means peripheral capillary oxygen saturation; PaCO2 means partial pressure of CO2 in arterial blood; FiO2 means fraction of inspired oxygen; Hgb means hemoglobin; S/F means SPO2/FiO2 ratio; P/F means PaO2/FiO2ratio; PA/F means PAO2/FiO2 ratio; OI means Oxygen Index; OSI means Oxygen Saturation Index
