Table 2:
Fetal Heart Rate characteristics in 30 minutes prior to delivery with presence or absence of nuchal cord
| True Knot n=49 | No True Knot n=8531 | P-value | OR | aOR* | |
|---|---|---|---|---|---|
| Decelerations | |||||
| Repetitive Late decelerations | 2 (4.08) | 282 (3.31) | 0.85 | 1.14 (0.28–4.73) | 1.04 (0.25–4.40) |
| Repetitive Variable decelerations | 13 (26.53) | 2354 (27.59) | 0.60 | 0.84 (0.45–1.60) | 0.82 (0.43–1.55) |
| Baseline | |||||
| Baseline >160 | 0 | 276 (3.24) | 0.41 | --- | --- |
| Baseline < 110 | 0 | 20 (0.23) | >0.99 | --- | --- |
| Variability | |||||
| Moderate Variability | 25 (51.02) | 3922 (45.97) | 0.48 | 1.22 (0.70–2.15) | 1.35 (0.76–2.41) |
| Minimal Variability | 8 (16.33) | 1437 (16.85) | 0.92 | 0.96 (0.45–2.06) | 0.98 (0.46–2.11) |
| Marked Variability | 0 | 11 (0.13) | >0.99 | --- | --- |
| Absent Variability | 0 | 1 (0.01) | >0.99 | --- | --- |
| Category | |||||
| Category 1 | 2 (4.08) | 218 (2.56) | 0.50 | 1.62 (0.39–6.72) | 1.78 (0.42–7.48) |
| Category 2 | 27 (55.10) | 5155 (60.43) | 0.45 | 0.80 (0.46–1.41) | 0.86 (0.48–1.53) |
| Category 3 | 0 | 1 (0.01) | 0.94 | --- | --- |
| Neonatal Outcomes | |||||
| NICU Admission | 1 (2.04) | 131 (1.54) | 0.53 | 1.33 (0.18–9.75) | 1.33 (0.18–9.88) |
| Arterial cord pH<7.10 | 0 | 149 (1.75) | >0.99 | --- | --- |
| 5-min APGAR<7 | 0 | 208 (2.44) | 0.63 | --- | --- |
| Neonatal Death | 0 | 4 (0.05) | 0.02 | --- | --- |
Data presented as n (%), OR (odds ratio), aOR (adjusted odds ratio)
*
Adjusted for nulliparity, oxytocin use and indication for delivery is non-reassuring fetal status.