Table 3.

Comparisons by t Test/χ² of Perinatal and Neonatal Outcomes^*

Variable	Cocaine Users (n=100)	Controls (n=100)
Preterm labor, %	40	22
Labor length, h	9.7±9.6	10.1±9.7
Birth weight, g	2624±769	2989±750†
Birth length, cm	45.7±6.6	48.3±3.0†
Apgar score
1 min	7.4±2.0	7.6±1.7
5 min	9.4±1.2	8.6±1.3
Gestational age, wk	34.9±4.1	38.5±2.8‡
Low birth weight (<2500 g), %	33	14‡
Very low birth weight (<1500 g), %	10	6

^*Unless otherwise indicated, values are mean±SD.

^†P<.05.

^‡P<.01.