. Author manuscript; available in PMC: 2010 Jul 1.

Published in final edited form as: Neurotoxicol Teratol. 2009 Feb 27;31(4):216–224. doi: 10.1016/j.ntt.2009.02.002

Table 4.

Correlation Matrix Between Self-Report of Cigarette Use and Cotinine Levels(n=172)

	3 Months Prior Cig/Day	1^st Trimester Cig/Day	2^nd Trimester Cig/Day	3^rd Trimester Cig/Day	Log of Cotinine Maternal Blood at Birth	Log of Cotinine Maternal Urine at 6-months	Log of Cotinine Infant Urine at 6-months
Overall Average Cig/Day	.876^***	.899^***	.834^***	.784^***	.411^***	.597^***	.340^***
3 Months Prior Cig/Day	-	.824^***	.555^***	.530^***	.271^**	.577^***	.273^**
1^st Trimester Cig/Day		-	.650^***	.542^***	.279^**	.589^***	.336^***
2^nd Trimester Cig/Day			-	.800^***	.466^***	.397^**	.250^**
3^rd Trimester Cig/Day				-	.507^***	.435^***	.199^*
Log of Cotinine Maternal Blood at Birth					-	.208^*	ns
Log of Cotinine Maternal Urine at 6-months						-	.368^***

^Tp <.10,

p <.05,

^**

<.01,

^***

<.001