TABLE 2.

Estimated Proportion of Variance in Liability to Common DSM-IV Axis I and All Axis II Disorders Due to Genetic Effects (Heritability) and Individual-Specific Environment

Disorder	Heritability (a2)	Individual-Specific Environmental Effects (e2)
Major depression	0.43	0.57
Generalized anxiety disorder	0.51	0.49
Eating disorder	0.42	0.58
Social phobia	0.57	0.43
Agoraphobia	0.60	0.40
Specific phobia	0.55	0.45
Somatoform disorder	0.44	0.56
Dysthymia	0.28	0.72
Panic disorder	0.55	0.45
Alcohol abuse or dependence	0.52	0.48
Drug abuse or dependence	0.59	0.41
Conduct disorder	0.57	0.43
Paranoid personality disorder	0.29	0.71
Schizoid personality disorder	0.34	0.66
Schizotypal personality disorder	0.38	0.62
Antisocial personality disorder	0.50	0.50
Borderline personality disorder	0.49	0.51
Histrionic personality disorder	0.32	0.68
Narcissistic personality disorder	0.35	0.65
Dependent personality disorder	0.37	0.63
Avoidant personality disorder	0.47	0.53
Obsessive-compulsive personality disorder	0.34	0.66