A study published in Heart, by Dr. David S. Krantz (2009), entitled “Psychotropic medication use and risk of adverse cardiovascular events in women with suspected coronary artery disease’ suggests that women with coronary artery disease (CAD) who report taking antidepressant or anti-anxiety medications have a higher risk of having an adverse cardiovascular event (e.g., heart attack or stroke) than those women not on these medications. To show this, the authors chose a sample of women with CAD and measured the rate of adverse cardiovascular events and the number of them on antidepressant or anti-anxiety medications and looked for an overlap of the two criteria. This study would be considered An experimental study A correlational study An opinion-dependent study An example of anecdotal evidence