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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Psychol Addict Behav. 2012 May 7;27(2):431–442. doi: 10.1037/a0028235

Table 2.

Hierarchical regressions representing baseline white matter integrity (independent variable) predicting substance use behaviors and delinquent/aggressive behaviors 1.5 years later (dependent variables) in the substance use group (n = 47).

Independent, and Dependent Variable R2 ΔR2 Sig. F. Change F-value p-value
 Fornix FA, and substance use behaviors 1.5 years later
  Step 1 0.18 0.18 0.03 3.21 0.03
  Step 2 0.30 0.12 0.01 4.40 < 0.01
 SCR FA, and substance use behaviors 1.5 years later
  Step 1 0.18 0.18 0.03 3.21 0.03
  Step 2 0.28 0.10 0.03 3.90 < 0.01
 Fornix FA, and aggressive/delinquent behaviors 1.5 years later
  Step 1 0.25 0.25 0.01 4.01 0.02
  Step 2 0.35 0.10 0.02 4.80 < 0.01

Note. Step 1 included baseline substance use or aggression/delinquency, total depression score, and family history of alcohol use disorder; Step 2 included baseline white matter integrity for the region of interest.