Human and animal health: strengthening the link: Methodological concerns about animal facilitated therapy with dolphins

doi:10.1136/bmj.331.7529.1407

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Biju Basil, resident in psychiatry (bijubasil@yahoo.com),
Maju Mathews, professor of psychiatry

Drexel University College of Medicine, Philadelphia, PA 19124 USA

Editor—We have the following concerns with Antonioli and Reveley's study of animal facilitated depression with dolphins in the treatment of depression.1

The study was small (30 patients), only 13 people from the animal care programme and 12 from the outdoor nature programme completing the study. The authors used a conservative measure to estimate the …