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. Author manuscript; available in PMC: 2007 Oct 16.
Published in final edited form as: Biol Psychiatry. 2007 Feb 16;62(6):607–615. doi: 10.1016/j.biopsych.2006.10.029

Table 4.

Factors Affecting Brain Volume Measures in Alcoholic Patients

r2 Sex Height Age Family History Age of Onset Family History X Age of Onset
complete model F p F p F p F p F p F p
ICV 0.33 20.277 < 0.0001 11.884 0.001 0.01 0.92 13.232 < 0.0001 0.379 0.539 5.209 0.023
Brain/ICV 0.30 5.692 0.0179 0.0176 0.8945 61.337 < 0.001 2.119 0.1469 0.001 0.979 0.765 0.383
Gray/ICV 0.39 1.557 0.213 2.639 0.105 105.748 < 0.001 1.674 0.197 0.1194 0.729 1.716 0.191
White/ICV 0.19 9.917 0.002 2.245 0.135 13.427 < 0.001 1.81 0.179 0.106 0.744 0.209 0.647

The value of r2 equals the amount of variance explained by all of the factors (sex, height, age, family history, and age of onset) included in the model.