Assessing impairment in patients with panic disorder: the Sheehan Disability Scale
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The DSM-III-R incorporates both distress (symptoms) and disability (impairment) in the definition of a psychiatric disorder. In psychiatric research there is a wide array of instruments used to measure symptom severity, but a limited selection for the assessment of impairment. The psychometric properties of one such instrument, The Sheehan Disability Scale (Sheehan 1983), are evaluated in this paper. The data analyzed come from two studies of patients with panic disorder, the Cross National Collaborative Panic Study-Phase I and the Panic Depression Study. In this report both the alpha coefficients and factor analyses indicate that the reliability of the scale is acceptable. The factor structure of the items and the sensitivity to change of their composite demonstrate satisfactory construct validity. The criterion-related validity is substantiated by the significant relationship between symptomatology and impairment. These analyses were limited to patients with panic disorder. Further work is needed to evaluate the instrument in assessing patients with other disorders.
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- American Psychiatric Association (1986) Diagnostic and Statistical Manual of Mental Disorders, 3rd edn. American Psychiatric Association, Washington, p xxiiGoogle Scholar
- Ballenger JC, Burrows GD, DuPont RL, Lesser IM, Noyes R Jr., Pecknold JC (1988) Alprazolam in panic disorder and agoraphobia: results from a multicenter trial: I. Efficacy in short-term treatment. Arch Gen Psychiatry 45: 413–422Google Scholar
- Cohen J (1988) Power Analysis for the behavioral sciences. Erlbaum, HillsdaleGoogle Scholar
- Cronbach LJ (1951) Coefficient alpha and the internal structure of tests. Psychometrika 16: 297–334Google Scholar
- Joreskog K, Sorbom D (1987) LISREL VII Users' Manual. Scientific Software, MooresvilleGoogle Scholar
- Keller M, Lavori PW (submitted) The influence of varying degrees of depression on the comparative efficacy of treating panic disorder with imipramine, alprazolam or placeboGoogle Scholar
- Klerman GL (1988) An overview of the Cross-National Collaborative Panic Study. Arch Gen Psychiatry 45: 407–412Google Scholar
- Nunnally JC (1978) Psychometric Theory. McGraw-Hill, New YorkGoogle Scholar
- Pedhazur EJ (1982) Multiple regression in behavioral researcin explanation and prediction. Holt, Rinehart & Winston New YorkGoogle Scholar
- Sheehan DV (1983) The Anxiety disease. Scribner, New YorkGoogle Scholar