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. Author manuscript; available in PMC: 2012 Jan 1.
Published in final edited form as: Neurotoxicol Teratol. 2011 Jan–Feb;33(1):47–60. doi: 10.1016/j.ntt.2010.08.002

Table 2.

Correlations1,2 between Use/No Use of Alcohol, Tobacco, and Marijuana and Stroop Variables for Cocaine Exposed3 and Non-Cocaine Exposed Participants

Variable 1 2 3 4 5 6 7 8 9 10 11 12 13 14
1. Prenatal Alcohol Exp. --- --- --- −.13 −.09 −.08 −.09 −.14 −.03 .08 .02 −.09 .06 −.22
2. Prenatal Tobacco Exp. --- --- --- −.06 −.02 .05 −.11 −.13 −.14 .06 −.06 −.13 −.04 −.14
3. Prenatal Marijuana Exp. --- --- --- .09 .04 .04 .07 −.08 −.01 −.11 −.05 −.01 −.09 −.06
4. Stroop Time 90 Months −.13 .04 .03 --- .27* .29* .14 .12 .03 −.08 −.18* −.13 −.19* .05
5. Stroop Time 114 Months −.14 .08 −.16 .47* --- .62* .02 .39* .24* .06 .02 .01 .04 .07
6. Stroop Time 138 Months −.15 −.05 −.04 .52* .73* --- .12 .27* .26* .10 .07 −.07 .06 .16
7. Stroop Errors 90 Months −.27* −.02 .02 .40* .17 .31* --- .24* .15 −.04 .12 .06 .12 .05
8. Stroop Errors 114 Months −.03 −.01 −.15 .08 .36* .35* .14 --- .40* .01 .09 −.02 .09 .20
9. Stroop Errors 138 Months .07 −.08 .07 .21 .30* .52* .21 .45* --- −.05 .14 −.01 .07 .04
10. Maternal Less than HS Ed. −.10 −.02 .01 −.08 .14 .02 .05 .12 .09 --- .13 .10 .78* −.01
11. Birth Weight Less than 2500 Gs −.04 .12 .12 .06 −.05 .08 .10 −.10 −.09 −.11 --- −.02 .69* −.05
12. Second APGAR Less than 7 .13 −.04 .25* −.04 na4 −.12 .01 na −.16 −.05 .26* --- .22* −.18
13. Risk −.11 .08 .10 −.06 .10 .08 .12 .06 −.01 .75* .55* .20* --- −.12
14. CBCL Aggression 168 Months −.09 −.05 .15 −.13 .04 .27 .15 −.02 .29 .02 .09 na .08 ---
1

Associations between variables 1, 2, 3, 10, 11, and 12 and between these variables and other variables in the table are Point-Biserial correlations. When appropriate, variables in this table reflect log transformations (See Table 3 and 4) to account for substantial distributional non-normality (e.g. skew).

2

Samples sizes for pairs of variables are different throughout due to missing data across time.

3

Associations between variables within the CE group are presented to the left and above the diagonal; associations between variables within the NCE group are presented to the right and below the diagonal.

4

Due to the low occurrence of APGAR scores below 7 in the NCE sample, associations could not be computed for selected pairs of variables when no variation in APGAR scores was present.

*

p < .05