Can Obstetric Risk Factors Predict Fetal Acidaemia at Birth? A Retrospective Case-Control Study
Table 3
Delivery and neonatal outcome.
Intrapartum factors
Non-acidaemia pH > 7.20 (N = 294)
Acidaemia pH < 7.20 (N = 294)
Missing %
p-value
Odds ratios (95% CI intervals)
Induction
93 (32.3%)
90 (30.8%)
1.36%
0.703
0.93 (0.69 - 1.37)
Epidural
129 (44.5%)
135 (46.4%)
1.19%
0.644
1.08 (0.78 - 1.50)
Meconium staining
64 (30.3%)
71 (34.0%)
28.57%
0.425
1.18 (0.78 - 1.78)
FBS (Foetal blood sample)
47 (16.3%)
46 (15.9%)
1.70%
0.910
0.98 (0.63 - 1.52)
Pyrexia
30 (61.2%)
21 (28.0%)
80.10%
<0.001
0.23 (0.12 - 0.53)
Continuous intrapartum CTG
239 (83.6%)
218 (76.8%)
3.1%
0.042
0.65 (0.43 - 0.99)
Median duration of labour in minutes (interquartile range)
811 (279-722)
705 (233-636)
19.00%
0.021
Syntocinon
183 (64.7%)
170 (60.9%)
0.00%
0.360
0.85 0.61 - 1.20
Method of delivery
Unassisted
45 (15.5%)
64 (22.0%)
0.00%
REFERENCE
Instrumental
83 (28.5%)
131 (45.0%)
0.664
1.11 (0.69 - 1.78)
Emergency caesarean
160 (55.0%)
95 (32.6%)
<0.001
0.42 (0.26 - 0.66)
Elective caesarean
3 (1.0%)
1 (0.3%)
0.215
0.23 (0.02 - 2.33)
Median APGAR at 1 minute (interquartile range)
8 (7-9)
7 (6-9)
1.28%
<0.001
Median APGAR at 5 minutes (interquartile range
9 (9-9)
9 (9-9)
1.28%
0.025
NICU admission
26 (9.1%)
25 (8.7%)
2.7%
0.863
0.95 (0.54 - 1.69)
Mean birthweight in grams ± (SD)
3201 (512)
3042 (481)
0.0%
0.138
Intrapartum and postpartum analysis. Binary logistic regression was performed for categorical variables. Independent t-test was performed for birth weight and Mann-Whitney U test was performed for duration of labour and APGAR scores.
