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Table 1 Main maternal and perinatal characteristics of the study population, with the subdivisions into normal versus acidemic groups, and normal versus operative vaginal deliveries

From: Electrocardiography versus photoplethysmography in assessment of maternal heart rate variability during labor

  Fetuses born with UAB pH ≥7.15 (n = 45) Fetuses born with UAB pH <7.15 (n = 6) p-value Normal deliveries (n = 28) Vaginal operative deliveries (n = 19) p-value
Maternal data, median (IQR)
 Age (years) 28 (3.5) 27 (10) 0.597 28 (8.0) 28 (9.0) 0.550
 Parity 0 (1) 0 (1) 0.853 0 (1) 0 (0) 0.001
 Gestational age (weeks) 39.9 (1.3) 39.8 (2.5) 0.578 39.7 (1.1) 39.9 (1.1) 0.415
Delivery, n (%)    0.693   
 Vaginal, normal 25 (56 %) 3 (50 %)   
 Vaginal, operative 17 (37 %) 2 (33 %)   
 Cesarean section 3 (7 %) 1 (17 %)   
Epidural analgesia, n (%) 45 (100 %) 6 (100 %) 28 (100 %) 19 (100 %)
Newborn data, median (IQR)       
 Birthweight (g) 3190 (393) 3078 (381) 0.255 3160 (350) 3200 (405) 0.871
 1 min Apgar score 9 (1) 9 (0) 0.679 9 (1) 9 (1) 0.957
 5 min Apgar score 10 (0) 10 (0) 0.679 10 (0) 10 (0) 0.687
 UAB pH 7.27 (0.09) 7.10 (0.06) 0.000 7.27 (0.10) 7.22 (0.09) 0.109
Gender, n (%)    0.191    0.246
 Males 24 (53 %) 1 (17 %)   11 (39 %) 11 (58 %)  
 Females 21 (47 %) 5 (83 %)   17 (61 %) 8 (42 %)  
  1. Values within brackets in the header correspond to the number of cases
  2. p-value <0.05 is in italic