|Year : 2009 | Volume
| Issue : 3 | Page : 191-194
Inter-rater reliability of Hamilton depression rating scale using video- recorded interviews - Focus on rater-blinding
M Krishna Prasad1, K Udupa2, KR Kishore2, J Thirthalli1, TN Sathyaprabha2, BN Gangadhar1
1 Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore - 560029, India
2 Department of Neurophysiology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore - 560029, India
Background: Hamilton depression rating scale (Ham-D) is the most widely used clinician rating scale for depression. There has been no Indian study that has examined the inter-rater reliability (IRR) of video-recorded interviews of the 21-item Ham-D.
Aim: To study the IRR of scoring video-recorded interviews for 21-item Ham-D.
Materials and Methods: Eighteen subjects with major depressive disorder involved in a larger study were interviewed using the semi-structured clinical interview of the 21-item Ham-D by a primary rater after informed consent. These interviews were video-recorded and portions edited to ensure rater blinding. Subsequently, the video-recorded interviews were rated by a "blind" rater. Both rated the different sub-domains of Ham-D according to Rhoades and Overall (1983). IRR was evaluated using intra-class correlation coefficient.
Results: Excellent IRR was observed (0.9891) between the two raters. This was true for each of the primary factors and super-factors.
Conclusion: Video recorded 21-item Ham-D has excellentIRR. Video-recorded interviews of Ham-D can be reliably used to blind raters in research.
National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore - 560 029
Source of Support: None, Conflict of Interest: None
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