Table 3.
Regression coefficients: effect of clamped and unclamped umbilical cord samples on pH and BE values, adjusted for maternal-foetal characteristics and intrapartum variables
| Variable | Umbilical cord BGA (n = 6884) | |||||
|---|---|---|---|---|---|---|
| pH | BE | |||||
| β | (95% CI) | p value | β | (95% CI) | p value | |
| Group B (vs group A) | − 0.0076 | (− 0.0113; − 0.0038) | 0.001 | − 0.4454 | (− 0.5789; − 0.3120) | 0.001 |
| BMI | − 0.0006 | (− 0.0010; − 0.0003) | 0.001 | − 0.0032 | (− 0.0167; 0.0103) | 0.644 |
| Other maternal disease* | 0.0089 | (0.0007; 0.0171) | 0.033 | 0.3381 | (0.0452; 0.6312) | 0.024 |
| Fetal polyhydramnios | − 0.0013 | (− 0.0083; 0.0058) | 0.726 | − 0.1744 | (− 0.4262; 0.0774) | 0.175 |
| Fetal macrosomia | − 0.0074 | (− 0.0188; 0.0040) | 0.203 | − 0.0772 | (− 0.4857; 0.3314) | 0.711 |
| Spontaneous labour | − 0.0275 | (− 0.0329; − 0.0221) | 0.001 | − 2.3016 | (− 2.4953; − 2.1079) | 0.001 |
| Induction of labour | − 0.0309 | (− 0.0369; − 0.0249) | 0.001 | − 2.5002 | (− 2.7148; − 2.2856) | 0.001 |
| Epidural analgesia | − 0.0096 | (− 0.0140; − 0.0052) | 0.001 | − 0.0805 | (− 0.2380; 0.0770) | 0.317 |
| Previous uterine surgery | 0.0048 | (− 0.0002; 0.0098) | 0.062 | 0.3493 | (0.1699; 0.5287) | 0.001 |
BGA blood gas analysis, BMI body mass index, BE base excess
*Other maternal complications = heart diseases, lung disease, Kidney disease, autoimmune disease, metabolic disease, coagulopathy