Bipolar versus unipolar and primary versus secondary affective disorder: which diagnosis takes precedence?

@article{Andreasen1988BipolarVU,
  title={Bipolar versus unipolar and primary versus secondary affective disorder: which diagnosis takes precedence?},
  author={Nancy C. Andreasen and William M. Grove and William H. Coryell and Jean M Endicott and Paula J. Clayton},
  journal={Journal of affective disorders},
  year={1988},
  volume={15 1},
  pages={
          69-80
        }
}
The primary versus secondary distinction is often used as a way of subtyping depression. Its applicability to bipolar disorders has been unclear. This report examines the relative primacy of the bipolar versus unipolar distinction as compared to the primary versus secondary distinction in a sample of 955 patients in the NIMH Collaborative Study of the Psychobiology of Depression. These patients are divided into nine groups of the basis of whether they are bipolar I, bipolar II, or unipolar, and… CONTINUE READING

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