Table II.
Multivariable linear regression analysis of IQ and deletion size with adjustment of covariates
| Full scale IQ | Verbal IQ | Performance IQ | |||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| β(SE)a | P | β(SE) | P | β(SE) | P | ||
| Deletion type | AD (reference) | ||||||
| AB | 6.25(2.02) | 0.002 | 8.17(2.22) | 2.31E-04 | 4.03(2.32) | 0.028 | |
| Age | −0.06(0.06) | 0.259 | −0.08(0.07) | 0.173 | −0.07(0.06) | 0.244 | |
| Gender | Male (reference) | ||||||
| Female | 1.84(0.94) | 0.05 | 1.20(0.99) | 0.23 | 3.40(1.03) | 0.001 | |
| Study site | Canada & US (reference) | ||||||
| Northern Europe | −5.85(1.15) | 1.00E-06 | −5.86(1.26) | 4.00E-06 | −4.92(1.24) | 7.60E-05 | |
| Southern Europe | −4.67(1.48) | 0.002 | −3.11(1.59) | 0.051 | −2.51(1.68) | 0.135 | |
| UK & Australia | −0.51(1.51) | 0.737 | −2.58(1.69) | 0.127 | 3.03(1.03) | 0.001 | |
a
β(SE) stands for regression coefficient (standard error) from multivariable linear regression analysis; CHD was not included in the model due to the finding that P >0.05 from the independent-samples t-test.