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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Sci Stud Read. 2019 Jul 8;24(1):23–56. doi: 10.1080/10888438.2019.1631827

Table 10.

Moderators of bivariate genetic correlations for reading and math.

Moderator k QM(df) p τ2 I2 (%) R2 (%)
Age 63 2.75(1) .10 0.27 99.9 2.76
Race Reported 10 1.25(1) .26 0.12 99.7 2.58
Race Inferred 63 0.04(1) .85 0.28 99.9 0.00
Grade-Level 13 28.18(4) <.01 0.05 99.1 67.28
Project 60 12.42(5) .03 0.25 99.9 11.24
Nationality 63 4.48(3) .21 0.27 99.9 2.35
Clinical Status 63 0.46(1) .50 0.28 99.9 0.00
Reading Assessment 63 19.93(9) .02 0.23 99.9 15.00
Reading Domain 63 3.94(6) .68 0.28 99.9 0.00
Reading Assessment Format 63 11.39(4) .02 0.24 99.9 10.70
Math Assessment 63 12.31(6) .06 0.25 99.9 9.31
Math Domain 63 12.42(6) .05 0.25 99.9 9.41
Math Assessment Format 63 4.27(5) .51 0.28 99.9 0.00
DeFries-Fulker 63 0.41(1) .52 0.28 99.9 0.00

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.