Table 2–
Pearson and Spearman correlation coeffici ents (95% Confidence Intervals) between mediators and outcomes
| Childhood |
Adolescence |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Externalizing a | Hyperactivity-impulsivitya | OD/CD a | Blood Pb | Externalizingb | Hyperactivity-impulsivityb | Conduct disorderb | Binge drinkingb | Cannabis useb | |
| Childhood | |||||||||
| Blood Pb | 0.26 (0.12, 0.39) | 0.21sp (0.07, 0.35) | 0.20sp (0.06, 0.32) | 0.40 (0.28, 0.51) | 0.08 (−0.04, 0.22) | 0.10 (−0.04, 0.23) | 0.08sp (−0.06, 0.21) | −0.03 (−0.17,0.08) | 0.12sp (−0.02, 0.25) |
| Externalizing a | 1 | 0.73sp (0.66, 0.79) | 0.82sp (0.77, 0.87) | 0.25 (0.13, 0.36) | 0.20 (0.009, 0.32) | −0.003 (−0.13, 0.14) | 0.09sp (−0.05, 0.22) | 0.14 (−0.02, 0.28) | 0.20sp (0.06, 0.33) |
| Hyperactivity-impulsivity a | - | 1 | 0.65sp (0.56, 0.72) | 0.18sp (0.04, 0.30) | 0.11sp (−0.02, 0.25) | −0.01sp (−0.16, 0.14) | 0.07sp (−0.07, 0.21) | 0.05sp (−0.09, 0.19) | 0.10sp (−0.04, 0.23) |
| OD/CD a | - | - | 1 | 0.21sp (0.08, 0.33) | 0.19 sp (0.05, 0.32) | −0.04 sp (−0.17, 0.10) | 0.08 sp (−0.05, 0.22) | 0.10 sp (−0.04, 0.24) | 0.23 sp (0.08, 0.36) |
| Adolescence | |||||||||
| Blood Pb | - | - | - | 1 | 0.01 (−0.12, 0.15) | −0.04 (−0.17, 0.09) | 0.05sp (−0.08, 0.19) | 0.16 (0.03, 0.30) | 0.13sp (−0.02, 0.27) |
| Externalizing b | - | - | - | - | 1 | 0.44 (0.32, 0.57) | 0.34sp (0.21, 0.45) | 0.22 (0.10, 0.34) | 0.32sp (0.19, 0.43) |
| Hyperactivity-impulsivity b | - | - | - | - | - | 1 | 0.16sp (0.03, 0.29) | 0.10 (−0.04, 0.24) | −0.02sp (−0.15,0.12) |
| Conduct disorder b | - | - | - | - | - | - | 1 | 0.09sp (−0.05, 0.23) | 0.18sp (0.05, 0.31) |
| Binge drinking b | - | - | - | - | - | - | - | 1 | 0.17sp (0.03, 0.30) |
Sample size for individual comparisons varies between 195 and 212 due to missing values.
Note: OD/CD, Oppositional defiant/conduct disorder
a
teachers assessment
b
self-reported with assistance of interviewer, sp, Spearman coefficient.