Table 5.
Moderators of bivariate genetic correlations for reading and ADHD symptoms.
| Moderator | k | QM(df) | p | τ2 | I2 (%) | R2 (%) |
|---|---|---|---|---|---|---|
| Age | 74 | 5.34(1) | .02 | 0.19 | 99.9 | 5.64 |
| ADHD Reliability | 35 | 0.08(1) | .78 | 0.04 | 99.7 | 0.00 |
| Race Reported | 31 | 2.68(1) | .10 | 0.23 | 99.9 | 5.30 |
| Race Inferred | 91 | 6.45(1) | .01 | 0.16 | 99.8 | 5.80 |
| Grade-Level | 23 | 2.74(3) | .43 | 0.04 | 98.5 | 0.00 |
| Project | 85 | 16.96(7) | .02 | 0.16 | 99.8 | 10.68 |
| Nationality | 91 | 16.44(4) | <.01 | 0.15 | 99.8 | 12.21 |
| Clinical Status | 91 | 4.37(1) | .04 | 0.17 | 99.8 | 3.60 |
| Read Assessment | 91 | 20.08(14) | .13 | 0.16 | 99.8 | 1.46 |
| Reading Domain | 91 | 5.98(7) | .54 | 0.17 | 99.8 | 0.00 |
| Reading Assessment Format | 91 | 6.30(5) | .28 | 0.17 | 99.8 | 1.46 |
| ADHD Assessment | 88 | 48.06(8) | <.01 | 0.12 | 99.8 | 31.78 |
| ADHD Component | 91 | 3.58(2) | .17 | 0.17 | 99.8 | 1.71 |
| DeFries-Fulker | 83 | 5.83(1) | .02 | 0.18 | 99.9 | 5.60 |
Note. Significant (p < .05) moderators are indicated in bold. k represents the number of studies included in the analysis. R2 indicates the total amount of heterogeneity accounted for by the specified moderator. SES reported did not show sufficient variability for moderator analyses.