noun

• 1A person who does not reply to a communication such as a survey or questionnaire.

  More example sentences

  • ‘a follow-up letter was sent to non-responders three weeks after the initial mailing’

• 2A person who does not respond, or does not respond satisfactorily, to a drug, therapy, or other treatment.

  ‘non-responders are likely to respond if switched to an antidepressant with a different mechanism of action’

  More example sentences

  • ‘if a patient is a non-responder after 12 weeks, there may be other causal factors (i.e. non-compliance)’