Overall Depression and Impairment Scale (ODSIS)

The Overall Depression and Impairment Scale (ODSIS) is a five-item questionnaire that captures the severity and worsening of depressive symptomatology. The questionnaire assesses the most important areas of depression and subsyndromal depressive symptoms, while remaining independent of specific subtypes of mood disorders as defined by the DSM-5. Items relate to the frequency of symptoms, their intensity, and their interference with work or school and social life. Items ask about experiences in the last week.

Note: When administering, it is helpful to provide respondents with a definition of depression.

Length of completion

The ODSIS will take approximately 3-4 minutes to complete.

Individualized feedback for the respondent

By completing the scale, the respondent will determine the severity of his/her depressive symptoms, and whether they have improved or worsened after repeated completion.

Keywords

Overall Depression Severity and Impairment Scale, ODSIS, depression, depressive disorder, depressive symptoms

Scoring and interpretation

Responses to items are coded from 0 to 4 and can be summed to obtain a total score ranging from 0 to 20. Higher scores indicate greater severity and functional impairment due to symptoms of depression.

Response Scale

The responses to the items in this English adaptation correspond to the original version. For each item, there are always four possible responses scored according to severity on a scale of 0 to 4. An example of a response might be. I have not felt any depression in the past week." (0) or “Constant depression. I felt depressed all the time.” (4).

References

Bentley, K. H., Gallagher, M. W., Carl, J. R., & Barlow, D. H. (2014). Development and validation of the Overall Depression Severity and Impairment Scale. Psychological Assessment, 26(3), 815–830. https://doi.org/10.1037/a0036216

Ito M., Bentley K. H., Oe Y., Nakajima S., Fujisato H., Kato N., et al. (2015) Assessing Depression Related Severity and Functional Impairment: The Overall Depression Severity and Impairment Scale (ODSIS). PLoS ONE 10(4): e0122969. https://doi.org/10.1371/journal.pone.0122969

Osma, J., Quilez-Orden, A., Suso-Ribera, C., Peris-Baquero, O., Norman, S. B., Bentley, K. H., & Sauer-Zavala, S. (2019). Psychometric properties and validation of the Spanish versions of the overall anxiety and depression severity and impairment scales. Journal of affective disorders, 252, 9–18. https://doi.org/10.1016/j.jad.2019.03.063

Sandora, J., Novak, L., Brnka, R., van Dijk, J. P., Tavel, P., & Malinakova, K. (2021). The Abbreviated Overall Anxiety Severity and Impairment Scale (OASIS) and the Abbreviated Overall Depression Severity and Impairment Scale (ODSIS): Psychometric Properties and Evaluation of the Czech Versions. International Journal of Environmental Research and Public Health, 18(19), 10337. https://doi.org/10.3390/ijerph181910337