Table 3. Correlation of Covariates with Conners CPT.
| Possible covariate | Errors of omission | Errors of commission | Hit RT SE | Hit RT block change | ||||
|---|---|---|---|---|---|---|---|---|
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| Young adult measures | r | p | r | p | r | p | r | p |
| Age (years) | .02 | .78 | .20 | .02 | .07 | .40 | .14 | .11 |
| Sex (M/F) | .15 | .08 | .09 | .32 | .18 | .03 | .34 | .00 |
| BMI (kg/m2) | .09 | .30 | -.03 | .77 | -.03 | .77 | -.15 | .09 |
| Cholesterol level (mg/dL) a | .03 | .73 | .07 | .43 | .02 | .79 | -.08 | .37 |
| Total fat a | .04 | .65 | .07 | .39 | .02 | .82 | -.11 | .22 |
| Total protein a | -.01 | .95 | .07 | .43 | .00 | .97 | -.12 | .15 |
| Ravens: RPM | -.00 | .99 | .00 | .99 | -.14 | .15 | .18 | .03 |
| TOMAL: CMIS | .04 | .67 | .06 | .53 | -.19 | .03 | .25 | .00 |
| WJ-R: BCAE | -.01 | .90 | .02 | .86 | -.17 | .07 | .12 | .25 |
| Computer in household | -.02 | .86 | -.21 | .02 | -.09 | .28 | -.05 | .56 |
| Video games in household | -.12 | .16 | -.15 | .08 | -.10 | .23 | -.07 | .40 |
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| Toxicants | ||||||||
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| HCB (ppb) a | .04 | .67 | .02 | .80 | .01 | .94 | .04 | .66 |
| p,p′-DDE (ppb) a | .12 | .15 | .04 | .64 | .09 | .27 | .14 | .09 |
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| Maternal measures | ||||||||
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| WJ-R: BCAS | .05 | .56 | .05 | .60 | -.08 | .36 | .13 | .16 |
| Breastfeeding duration a | .03 | .77 | -.05 | .60 | .05 | .59 | -.07 | .43 |
| Birth order | .04 | .68 | -.03 | .76 | -.04 | .62 | -.12 | .15 |
| Socioeconomic index | .07 | .45 | -.07 | .42 | -.12 | .15 | .02 | .84 |
| Cigarette use during pregnancy (#/day) | .20 | .02 | .05 | .55 | .12 | .17 | -.16 | .05 |
Note. CPT outcomes are T-scores and higher scores mean poorer performance.
Abbreviations. BMI = body mass index; ppb = parts per billion; Ravens: RPM = Ravens Progressive Matrices; TOMAL: CMIS = The Test of Memory and Learning: Composite Memory Index; WJ-R: BCAE = Woodcock Johnson-Revised Tests of Cognitive Ability: Broad Cognitive Ability Extended; WJ-R: BCAS = Woodcock Johnson-Revised Tests of Cognitive Ability Broad Cognitive Ability Standard; SES index includes maternal education, maternal employment, marital status and various assets.
Italic denotes variables collected earlier during MAWBS.
a
Log transformed.
Bold denotes p < .20.