The CORE Outcome Measure or CORE-OM is a 34-item global measure of distress that is designed to capture a range of ‘core’ concerns that present in therapy settings, including subjective wellbeing, problems/symptoms, functioning, and risk of harm to self or others. Further details can be found here and at the CORE System Trust pages.

Each item is rated in terms of its severity in the past week, on a scale from Not at all to Most or all the time. Responses to the items can be used in a variety of ways, but are typically added together to give either a total overall score, an average score across all the items, or average ‘domain’ scores for wellbeing, problems/symptoms, functioning, and risk of harm to self or others.

Privacy notice

The responses you give to the questions will be stored for only as long as the interaction is running. An email summary of your responses can be sent to you if you request it at the end.

This is an automated process. No one has access to your answers, and they are deleted when you finish running the interaction. We record only basic usage data, nothing more. No personal data. 

Using the measure with clients

You can test the measure using the interaction below. A simplified version should be sent for your clients to complete, which can be found here.


Either copy the page URL to send to your client with a request to complete the measure, or use the social share buttons on the page.

On entering their email address, the client will be sent a copy of their responses and scores which they are then free to share with you.

Copyright of all the CORE instruments is held by the CORE System Trust under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence.

This page and the CORE measure interaction have been developed in consultation with Professor Chris Evans of the CORE System Trust and we are grateful for his input and guidance.

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