A Comprehensive Evaluation of the Predictive Abilities of Fetal Electrocardiogram-Derived Parameters during Labor in Newborn Acidemia: Our Institutional Experience
Table 1
Main maternal and fetal characteristics of the studied population in relation to the newborn umbilical artery blood pH (pH > 7.20, nonacidemia; pH ≤ 7.20, acidemia).
Total (%)
Acidemia (%)
Nonacidemia (%)
value
Maternal age, y (mean ± SD)
30.08 ± 2.89
30.81 ± 2.34
29.83 ± 3.04
0.93
Maternal age ≥ 35 y
5 (7.9)
1 (6.3)
4 (8.5)
1.00
Gestational age at delivery, wk (median, range)
39.00 (37, 41)
39.00 (38, 41)
40.00 (37, 41)
0.77
BMI (median, range)
20.60 (15.8, 33.2)
20.70 (16.5, 31.7)
20.60 (15.8, 33.2)
0.91
BMI ≥ 30
4 (6.3)
2 (12.5)
2 (4.3)
0.57
Smoking
4 (6.3)
1 (6.3)
3 (6.4)
1.00
Any gestational hypertension or preeclampsia
6 (9.5)
2 (12.5)
4 (8.5)
1.00
Gestational DM
15 (23.8)
5 (31.3)
10 (21.3)
0.64
Premature rupture of membrane
20 (31.7)
4 (25.0)
16 (34.0)
0.50
Nulliparous
61 (96.8)
16 (100)
45 (95.7)
0.40
Prior C-section
0
0
0
-
Prior vaginal delivery#
2 (3.2)
0 (0)
2 (4.3)
0.55
Labor type
Spontaneous
55 (87.3)
13 (81.2)
42 (89.4)
0.40
Induced
12 (19.0)
4 (25.0)
8 (17.0)
0.74
Prostaglandin
10 (15.9)
3 (18.8)
7 (14.9)
1.00
Birth weight, g (mean ± SD)
3498.17 ± 452.00
3598.13 ± 414.75
3464.15 ± 463.27
0.72
Birth weight > 4000 g
9 (14.3)
3 (18.8)
6 (12.8)
0.86
Birth weight < 2500 g
0
0
0
-
Mode of delivery
Vaginal
55 (87.3)
13 (81.3)
42 (89.4)
0.40
Operative vaginal
6 (9.5)
3 (18.8)
3 (6.4)
0.34
Cesarean
8 (12.7)
3 (18.7)
5 (10.6)
0.68
Labor time, min (median, range)
495.00 (43, 1295)
491.00 (212, 1029)
495.00 (43, 1295)
0.31
Asphyxia (Apgar ≤ 7)
0
0
0
-
Arterial pH (median, range)
7.24 (6.98, 7.38)
7.16 (6.98, 7.19)
7.25 (7.21, 7.38)
<0.01
NICU admission
4 (6.3)
3 (18.8)
1 (2.1)
0.02
BMI: body mass index; DM: diabetes mellitus; NICU: neonatal intensive care unit. Pearson’s chi-square test. Continuity correction. #Fisher’s exact test.
