. Author manuscript; available in PMC: 2011 May 12.

Published in final edited form as: J Pediatr Psychol. 2005 Mar 23;31(1):15–26. doi: 10.1093/jpepsy/jsj022

Table IV.

Correlation Matrix for Variables in the Models

	Cocaine use	Cigarette use	Number of standard drinks/pregnancy	Number of days 5 or more drinks consumed	Maternal age	Birth weight	Birthlength	Head circumference	Heart rate
Cocaine use	—	—	—	—	—	—	—	—	—
Cigarette use	.50^*	—	—	—	—	—	—	—	—
Number of standard drinks/pregnancy	.70^**	.32^**	—	—	—	—	—	—	—
Number of days 5 or more drinks consumed	.72^**	.37^**	.94^**	—	—	—	—	—	—
Maternal age	.07	.09	.04	.03	—	—	—	—	—
Birth weight	−.14^**	−.32^**	−.02	−.02	−.16	—	—	—	—
Birthlength	−.18^*	−.20	.01	.00	−.15	.66^**	—	—	—
Head circumference	−.13	−.27^**	−.01	−.03	−.08	.68^**	.47^**	—	—
Heart rate	.35^*	.11	−.11	−.11	−.06	−.30^**	−.28^*	−.39^**	—
Respiratory sinus arrhythmia	−.09	.19	−.17	−.16	−.06	.24^*	.21^*	.14	−.25^**

p < .05.

^**

p < .01.