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The Carroll Rating Scale for Depression II. Factor Analyses of the Feature Profiles

Published online by Cambridge University Press:  29 January 2018

Peter E. Smouse
Affiliation:
Department of Human Genetics, University of Michigan, Ann Arbor 48109, USA
Michael Feinberg
Affiliation:
Department of Psychiatry, University of Michigan, Ann Arbor 48109, USA
Bernard J. Carroll
Affiliation:
Department of Psychiatry, Mental Health Research Institute, University of Michigan, Ann Arbor 48109, USA
Myoung H. Park
Affiliation:
Department of Human Genetics, University of Michigan, Ann Arbor 48109, USA
Sarah G. Rawson
Affiliation:
Department of Psychiatry, University of Michigan, Ann Arbor 48109, USA

Summary

Factor analyses were conducted for the Hamilton depression rating scale (HRS) and the self administered Carroll counterpart (CRS). The factor loadings for the respective first factors were similar; those for the respective second factors showed strict sign consistency but only moderate consistency of magnitude; the loadings for the respective third factors showed no particular consistency. The first three CRS and first three HRS factor scores were computed for each individual and correlations were computed from these factor scores. The first and second factors were highly correlated but the third factors were negatively correlated indicating that they were not measuring the same thing. The first factors of the CRS and HRS correlated highly with their respective raw total scores and were indices of the severity of illness. The self-administered CRS (with matching weights) is a credible alternative to the HRS for routine clinical assessment of the severity of depression.

Type
Research Article
Copyright
Copyright © Royal College of Psychiatrists, 1981 

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References

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