Table 1.

Newborn umbilical artery IGFBP-1 levels

Condition	IGFBP-1, ng/ml	P*
Normal	189.0 ± 71.82	na†
Respiratory acidosis	175.8 ± 45.93	0.789
Mixed metabolic/respiratory acidosis	470.6 ± 80.02	0.044*

^*P, compared to normal, by unpaired t test. P < 0.05 = significant. 

^†na, not applicable.