Overall Anxiety Severity and Impairment Scale (OASIS)
Recommended frequency: Every 2 weeks
The Overall Anxiety Severity and Impairment Scale (“OASIS”) is a brief continuous measure of overall anxiety severity and impairment. The OASIS can be used across anxiety disorders, with multiple anxiety disorders, and with sub-threshold anxiety symptoms. This instrument is 5 questions long and well validated in multiple settings and populations.
A cut-score of 8 correctly classifies 87% of a clinical population sample as having an anxiety diagnosis or not.
The following questions ask about anxiety and fear. For each question, select the number for the answer that best describes your experience over the past week.
Response items are coded from 0 to 4 and can be summed to obtain a total score range from 0 to 20.
Greenspace has provided the following guidance for scoring, which is based upon the answer keys in the assessment. Note that these scoring ranges have not been validated through research.
Norman, S. B., Hami Cissell, S., Means‐Christensen, A. J., & Stein, M. B. (2006). Development and validation of an overall anxiety severity and impairment scale (OASIS). Depression and anxiety, 23(4), 245-249.