1A person who does not reply to a communication such as a survey or questionnaire.
- ‘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’
- ‘if a patient is a non-responder after 12 weeks, there may be other causal factors (i.e. non-compliance)’
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