Table 1 Baseline characteristics of the study participants.

From: Optimal duration of cardiotocography assessment using the iPREFACE score to predict fetal acidemia

Characteristics (n = 145)

Values

Maternal age, years

33.2 ± 5.44

Parity, % (n)

 0

62.1 (90)

 1

26.9 (39)

 2

6.9 (10)

 ≥ 3

4.1 (6)

Gestational week, weeks

39.5 ± 1.08

Vacuum delivery, % (n)

23.4 (34)

Male sex, % (n)

59.3 (86)

Birthweight (g)

3056 ± 367

Apgar score

 1 min

8 (8–8)

 5 min

9 (9–9)

Umbilical artery blood acid–base analysis

pH

7.29 ± 0.09

PCO2 (mmHg)

47.2 ± 10.7

PO2 (mmHg)

21.9 ± 16.1

HCO3- (mmol/L)

22.3 ± 8.51

BE (mEq/L)

− 2.50 ± 3.09

Lactate (mmol/L)

4.82 ± 1.82

  1. Data were expressed as mean ± standard deviation, median (25–75%) or n (%).
  2. BE base excess, HCO3- bicarbonate, PO2 partial pressure of oxygen, PCO2 partial pressure of carbon dioxide.