Table 1

Characteristics of study and control groups

Meconium (n=60)Controls (n=26)
Results expressed as mean (SD) [range].
*p<0.05, ***p<0.001.
Gestational age (wk)39.1 (1.1) [37 to 41]38.3 (1.0) [37 to 41]
Birth weight (g)3337 (419) [2350 to 4400]3358 (368) [2750 to 4000]
Maternal age (y)27.6 (5)* [17 to 38]31.2 (4)* [24 to 41]
pH7.24 (0.08)* [7.06 to 7.40]7.31 (0.04)* [7.2 to 7.43]
Base excess (mEq/l)−5.98 (3.3)*** [−13.40 to 0]−2.59 (2.1)*** [−0.20 to −7.9]
Apgar score (5th minute)9.16 (1.1)* [5 to 10]9.62 (0.5)* [8 to 10]
Endothelin 1 (pg/ml)5.23 (9.2)*** [0.052 to 45.07]1.12 (0.89)*** [0.10 to 3.19]