. Author manuscript; available in PMC: 2011 Sep 1.

Published in final edited form as: Behav Genet. 2010 Apr 4;40(5):639–648. doi: 10.1007/s10519-010-9358-9

Table 2.

Descriptive statistics for clinical outcome measures.

	Alcohol	Tobacco	Cannabis	Antisocial Behavior	Conduct Disorder
Symptom counts
Mean	1.842	1.423	0.936	1.467	0.824
St. Dev.	2.307	1.897	2.172	1.434	1.356
Range	0 - 11	0 - 6	0 - 11	0 - 7	0 - 10
Inter-Quartile Range	1 - 3	0 - 3	0 - 0	1 - 2	0 - 1
Log-transformed symptom counts
Mean	0.753	0.600	0.340	0.748	0.418
St. Dev.	0.750	0.734	0.672	0.557	0.557