Research on how interactions between candidate genes and environmental factors influence psychiatric illnesses has generated enthusiasm but not many replicable findings. Duncan and Keller (p. 1041) discovered that the more closely a replication study matched the original research, the less likely it was to have similar results. Publication bias toward positive findings was apparent both in reports of novel findings and in replication studies. Another contributor to false discoveries in many studies of candidate genes is low statistical power due to small study groups or other design factors.

Prescription of antipsychotic medications during visits for anxiety disorders doubled between 1996 and 2007 among office-based psychiatrists, from 10.6% to 21.3% of visits. The nationwide data analyzed by Comer et al. (CME, p. 1057) demonstrate increases for comorbid FDA-approved indications, such as bipolar disorder, and for nonapproved indications. The greatest increase was among patients with panic disorder or agoraphobia. In an editorial, Breier (p. 1012) considers whether these findings indicate an unmet need for treatments for refractory anxiety disorders.

The difference in brain activation during emotional processing between elderly patients with and without major depressive disorder was greater for depressed patients with more white matter lesions. Aizenstein et al. (p. 1075) performed both structural and functional magnetic resonance imaging (MRI) of elderly subjects as they matched pictures of facial expressions. Although the findings support the hypothesis of "vascular depression," the levels of white matter hyperintensities were similar in the depressed and nondepressed elderly subjects.

Depression scores declined more for depressed patients with Parkinson's disease who received 10 weeks of cognitive-behavioral therapy (CBT) plus clinical monitoring than for those who received clinical monitoring only. The study of 80 patients by Dobkin et al. (CME, p. 1066) also showed greater improvements in anxiety, quality of life, coping, and Parkinson's disease symptoms in the CBT group. The editorial by Black (p. 1015) notes the high rate of depressive syndromes in Parkinson's disease and the greater possibility of antidepressant-related side effects and drug interactions.