Skip to Content


Pronunciation: kon-kor'dants


  1. Agreement in the types of data that occur in natural pairs. For example, in a trait such as schizophrenia, a pair of identical twins is concordant if both are affected or both are unaffected; it is discordant if only one is affected. Likewise, the pairs might be nonidentical twins, or siblings, or husband and wife.
  2. A negotiated, shared agreement between clinician and patient concerning treatment regimen(s), outcomes, and behaviors; a more cooperative relationship than those based on issues of compliance and noncompliance.

[L. concordia, agreeing, harmony]

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.