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Aim: To evaluate the concurrent validity of the Hamilton Depression Rating Scale (HAMD-17) against ICD10 criteria for depressive disorder and its performance as a screening and diagnostic tool for depression in patients with epilepsy (PWE). Subjects and Methods: One hundred and six PWE underwent clinical psychiatric examination followed by evaluation on HAMD-17. ICD-10 criteria for comorbid depressive disorder were applied. Internal consistency was assessed using Cronbach’s α. A “receiver operating characteristics” (ROC) curve was obtained and the sensitivity, specificity, positive and negative predictive values (PPV, NPV) were calculated for different cut-off points of the HAMD-17. Results: Internal consistency measured by Cronbach’s ± was 0.74. Maximal discrimination between depressed and non depressed was obtained at a cut-off score of 8/9 (sensitivity 0.93, specificity 0.98). High sensitivity and NPV at the same cut-off score (sensitivity 0.93, NPV 1.0) show the screening properties, and high specificity and PPV at cut-offs 9/10, the diagnostic properties of the instrument. The area under the ROC curve (AUC=0.746) indicates the concurrent validity of the HAMD-17 score with the ICD-10 criteria for depressive disorder. Conclusion: The validity of the HAMD-17 against ICD-10 criteria for depressive disorder in PWE in our study is fair. The concurrent administration of diagnostic criteria can ascertain the presence of core symptoms of depression.

THE VALIDITY OF THE HAMILTON DEPRESSION RATING SCALE AS A SCREENING AND DIAGNOSTIC INSTRUMENT FOR DEPRESSION IN PATIENTS WITH EPILEPSY