Early Blood Gas Predictors of Bronchopulmonary Dysplasia in Extremely Low Gestational Age Newborns
Table 2
The distribution of infants who had a blood gas extreme (defined as a PaO2 or PCO2 in the highest or lowest quartile for gestational age on at least two of the first three postnatal days) listed at the top of each column within strata of potential confounders, listed on the left. These are column percents.
Potential confounder
Blood gas extreme
Lowest
Highest
Lowest
Highest
Row
PaO2
PaO2
PCO2
PCO2
Yes
No
Yes
No
Yes
No
Yes
No
Gestational age (weeks)
23-24
23
25
24
25
25
24
26
24
223
25-26
47
46
44
47
46
46
44
47
418
27
30
29
32
29
28
30
30
29
265
Birth weight -score <
Yes
25
20
25
20
23
20
30
18
59
Maternal fever
Yes
8
6
7
6
7
7
10
5
209
Placenta Mycoplasma
Yes
9
10
10
10
14
9
7
11
109
SNAPPE-II ≥45
Yes
33
28
37
28
34
28
47
24
263
Days ventilated
<7
14
22
19
21
21
20
6
25
186
7–13
9
11
8
11
9
10
10
10
92
14+
77
67
74
68
69
69
84
65
628
BPD
None
9
9
8
9
9
9
7
9
80
Mild/moderate
30
36
33
35
42
32
25
37
314
Severe
47
45
48
45
39
48
50
44
474
Very severe
14
10
11
11
9
11
17
9
98
Maximum column
195
711
189
717
201
705
197
709
906
Birth weight -scores based on Yudkin et al. [14] standard. Maternal temperature >100.4°F during pregnancy.
