Non-smokers

Smokers

pº

Number of subjects

107

67

Umbilical cord blood

pH in a. umbilicalis

7.31 ± 0.05

7.3 ± 0.05

0.001

pH in v. umbilicalis

7.37 ± 0.05

7.35 ± 0.05

0.012

pO₂ in a. umbilicalis (kPa)

2.4 ± 0.56

2.19 ± 0.69

0.004

pO₂ in v. umbilicalis (kPa)

3.8 ± 0.93

3.73 ± 1.08

0.004

pCO₂ in a. umbilicalis (kPa)

6.4 ± 0.95

6.7 ± 1.12

0.003

pCO₂ in v. umbilicalis (kPa)

5.1 ± 0.94

5.28 ± 1.11

0.002

COHb in a. umbilicalis (%)

0.7 ± 0.5

3.6 ± 1.1

p < 0.001

COHb in v. umbilicalis (%)

1.1 ± 0.5

3.7 ± 1.2

p < 0.001