Umbilical Cord Serum Erythropoietin Levels and Maternal Smoking in Pregnancy

Table 1

Relation between maternal smoking and neonatal characteristics.*

	Nonsmokers	Smokers	𝑃≤^†
Number of subjects	40	20
Maternal age (y)	27±5	25±4	NS
Number of parities	2±1	1.7±0.8	NS
Duration of gestation (wk)	40±1	40±1	NS
Birth weight (kg)	3.4±0.4	3.3±0.3	NS
Sex of neonate
Male	23 (57%)	10 (50%)	NS
Female	17 (43%)	10 (50%)
Apgar score
1st minute	8.3±0.4	8.4±0.4	NS
5th minute	9.5±0.5	9.4±0.5
Cord blood
pH	7.32±0.07	7.3±0.6	NS
PO2 (mm Hg)	25±7	22±3	NS
PCO2 (mm Hg)	44±8	48±10	NS
Erythropoietin (IU/L)	24±9	61±46	.001

*Data reported as mean ±SE or number (percent).
^†NS, not significant (𝑃>.05).