Table 2.
Characteristic | Hospitalization outcome | P valueb | |||
---|---|---|---|---|---|
Survival (n = 25)d | Death (n = 19) | ||||
N | Mean ± SD | N | Mean ± SD | ||
Admission blood gas | |||||
PcO2, mm Hg | 25 | 54.9 ± 20.9 | 19 | 45.5 ± 18.6 | 0.13 |
PcO2/FIO2, mm Hg | 25 | 72.2 ± 37.3 | 19 | 50.3 ± 30.2 | 0.04 |
PcCO2, mm Hg | 25 | 70.1 ± 25.2 | 19 | 91.3 ± 31.1 | 0.02 |
pH | 24 | 7.15 ± 0.19 | 17 | 7.01 ± 0.19 | 0.03 |
Base deficit, mEq/L | 24 | −5.20 ± 6.92 | 17 | −9.92 ± 8.57 | 0.058 |
Postadmission blood gas (≤24 h)c | |||||
Highest PcO2, mm Hg | |||||
Alive at 24 h | 24 | 87.0 ± 36.7 | 12 | 70.6 ± 21.1 | 0.16 |
Death at ≤24 h | --- | --- | 7 | 65.7 ± 19.6 | --- |
Highest PcO2/FIO2, mm Hg | |||||
Alive at 24 h | 24 | 140.5 ± 65.2 | 12 | 75.2 ± 23.8 | 0.002 |
Death at ≤24 h | --- | --- | 7 | 67.8 ± 19.7 | --- |
Highest PcCO2, mm Hg | |||||
Alive at 24 h | 24 | 73.3 ± 25.0 | 12 | 100.1 ± 34.6 | 0.01 |
Death at ≤24 h | --- | --- | 6 | 117.7 ± 26.7 | --- |
Lowest pH | |||||
Alive at 24 h | 23 | 7.14 ± 0.19 | 10 | 7.01 ± 0.20 | 0.09 |
Death at ≤24 h | --- | --- | 6 | 6.88 ± 0.09 | --- |
Highest base deficit, mEq/L | 0.131 | ||||
Alive at 24 h | 23 | −6.35 ± 6.71 | 10 | −10.42 ± 7.43 | --- |
Death at ≤ 24 h | --- | --- | 5 | −17.92 ± 3.66 | --- |
aAll blood gas data presented in this table were obtained before surgical intervention. b P values are from the 2-sample t-test comparing the given blood gas measurement between patients who survived hospitalization and patients who did not. cComparison of the gas exchange over the first 24 h are restricted to patients who survived at least 24 h. dIn the survivor group, one neonate had admission data, but missing information for postadmission blood gases. For this reason the sample sizes for the survival group are one less in the postadmission analysis than the admission analysis. Abbreviations: FIO2, fraction of inspired oxygen; PcCO2, partial pressure of carbon dioxide in the capillary blood; PcO2, partial pressure of oxygen in the capillary blood