TABLE 3.
Sex differences in the correlations between UPPS‐P subscores and GMVs
| Joint ROIs identified from whole‐brain regressions for | Girls | Boys | Slope test | |||
|---|---|---|---|---|---|---|
| r | p | r | p | t | p | |
| Lack of premeditation | ||||||
| All | .04 | .007 | .04 | .002 | 0.00 | .998 |
| Boys | .02 | .094 | .05 | <.001 | 1.59 | .113 |
| Sensation seeking | ||||||
| All | .07 | <.001 | .04 | <.001 | 1.80 | .072 |
| Girls | .10 | <.001 | .03 | .011 | 3.81 | <.001* |
| Boys | .05 | <.001 | .06 | <.001 | 0.53 | .594 |
| Positive urgency | ||||||
| All | −.13 | <.001 | −.10 | <.001 | 2.06 | .040 |
| Girls | −.14 | <.001 | −.10 | <.001 | 2.99 | .003* |
| Boys | −.11 | <.001 | −.11 | <.001 | 0.87 | .386 |
Note: Joint ROIs: all clusters identified from the regression were combined into a single mask. Correlations were computed with age in months, TIV, study site, and scanner model as covariates. *p values significant with correction for a total of 8 comparisons (.05/8 = .0063).
Abbreviations: GMV, gray matter volume; ROIs, regions of interest; TIV, total intracranial volume.