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Table 2 Comparing the demographic and clinical features, ABG findings, and neonatal outcomes in pregnancies with and without GDM.a

From: Comparing umbilical cord arterial blood gas findings in pregnancies with and without gestational diabetes mellitus following elective cesarean section: a multicenter retrospective cohort study in Iran

Variable

Groups

Non-GDM (n = 345)

GDM (n = 87)

P-value

Age; y

 

31.4 ± 6.3 [19.0, 42.0]

33.2 ± 6.0 [18.2, 42.0]

0.014b

BMI; kg/m2

 

29.1 ± 4.2 [22.9, 39.9]

29.9 ± 4.7 [23.5, 42.7]

0.124b

Gravida; n

 

2.7 ± 1.0 [1.0, 5.0]

2.9 ± 1.2 [1.0, 5.0]

0.205b

Gestational age at delivery; w

 

38.5 ± 0.8 [37.0, 40.0]

38.5 ± 0.8 [37.0, 40.0]

0.486b

Conception

Spontaneous

305 (88.9)

38 (78.2)

0.008c

 

ART

68 (11.1)

19 (21.8)

 

pH

 

7.36 ± 0.06 [7.2, 7.5]

7.33 ± 0.08 [7.1, 7.5]

0.006b*

PCO2; mmHg

 

44.88 ± 19.81 [33.4, 59.0]

47.59 ± 9.92 [32.5, 74.9]

0.215b

PO2; mmHg

 

13.05 ± 5.74 [5.0, 25.4]

13.13 ± 5.33 [6.2, 28.4]

0.902b

HCO3; mEq/L

 

22.95 ± 2.58 [17.5, 28.0]

22.85 ± 3.10 [16.9, 29.9]

0.760b

BD; mEq/L

 

-0.50 ± 2.74 [-6.0, 3.1]

-1.82 ± 3.79 [-14.8, 3.0]

0.003b*

Birthweight; g

 

3207.2 ± 439.8 [2150.0, 3980.0]

3253.6 ± 621.8 [1868.0, 4560.0]

0.514b

1-minute Apgar score

 

8.0 ± 1.0 [6.0, 9.0]

7.7 ± 1.3 [4.2, 9.0]

0.060b

5-minute Apgar score

 

9.3 ± 0.9 [7.0, 10.0]

9.1 ± 0.9 [7.0, 10.0]

0.146b

Resuscitation at birth

 

41 (12.0)

25 (28.7)

< 0.001c*†

NICU admission

 

58 (16.9)

30 (34.5)

< 0.001c*†

  1. Abbreviations: ABG = arterial blood gas, ART = assisted reproductive technology, BD = base deficit, BMI = body mass index, GDM = gestational diabetes mellitus, HCO3 = bicarbonate, NICU = neonatal intensive care unit, pH = potential of hydrogen, PCO2 = partial pressure of carbon dioxide, PO2 = partial pressure of oxygen
  2. The categorical data are presented as numbers (percentages) and continuous data as mean ± standard deviation [95% confidence interval]
  3. Independent t-test
  4. Chi-square test
  5. * The observed difference remained statistically significant (P-value < 0.05) after adjusting the analysis for age, BMI, gravidity, gestational age at delivery, and type of conception
  6. † The observed difference remained statistically significant (P-value < 0.05) after adjusting the analysis for age, BMI, gravidity, gestational age at delivery, type of conception, and presence of an umbilical cord arteria pH < 7.2