Table 1 Maternal, fetal, delivery and newborn characteristics associated with minor and major MHR-FHR ambiguities
From: Improvements in fetal heart rate analysis by the removal of maternal-fetal heart rate ambiguities
MHR-FHR ambiguity | |||
|---|---|---|---|
Minor (n = 17) | Major (n = 44) | p | |
Maternal characteristics | |||
Age (years) mean (SD) | 26 (6) | 28 (5) | 0.134 |
BMI mean (SD) | 27 (3) | 28 (3) | 0.186 |
Multiparity n (%) | 5 (29) | 11 (25) | 0.752 |
Labour | |||
Epidural n (%) | 17 (100) | 42 (95) | 1.000 |
Mode of delivery | 0.105 | ||
Cesarean n (%) | 4 (24) | 2 (4) | |
Operative vaginal n (%) | 5 (29) | 18 (41) | |
Normal vaginal n (%) | 8 (47) | 24 (55) | |
MHR | |||
Signal loss (%) median (IQR) | 9 (1 to 11) | 6 (1 to 16) | 0.834 |
Basal MHR (bpm) mean (SD) | 80 (12) | 77 (12) | 0.292 |
Accelerations (n) mean (SD) | 12 (6) | 18 (10) | 0.013 |
Decelerations (n) median (IQR) | 0 (0 to 0.5) | 0 (0 to 0) | 0.913 |
Abnormal LTV (%) median (IQR) | 0 (0 to 0) | 0 (0 to 0) | 0.705 |
FHR | |||
Signal loss (%) mean (SD) | 13 (7) | 22 (11) | 0.002 |
Baseline (bpm) mean (SD) | 140 (10) | 136 (12) | 0.180 |
Accelerations (n) median (IQR) | 9 (3 to 15) | 7 (4 to10) | 0.415 |
Decelerations (n) median (IQR) | 3 (1 to 7) | 8 (6 to 10) | 0.002 |
Prolonged decelerations (n) median (IQR) | 0 (0 to 0) | 0 (0 to 1) | 0.073 |
Abnormal LTV (%) median (IQR) | 3 (1 to 9) | 1 (0 to 3) | 0.055 |
Alarm n (%) | 0.001 | ||
Green-blue | 14 (82) | 15 (34) | |
Yellow-red | 3 (18) | 29 (66) | |
Newborn | |||
Gestational age (weeks) mean (SD) | 39 (1) | 39 (1) | 0.672 |
Male n (%) | 8 (47) | 26 (59) | 0.396 |
Birthweight (grams) mean (SD) | 3171 (366) | 3254 (318) | 0.384 |
Apgar 1 median (IQR) | 9 (9 to 10) | 9 (9 to 10) | 0.530 |
Apgar 5 median (IQR) | 10 (10 to 10) | 10 (10 to 10) | 0.298 |
UAB pH mean (SD) | 7.25 (0.08) | 7.24 (0.07) | 0.586 |