Response-rate ratio is a measure of efficacy of therapy in clinical trials. It is defined as the proportion of improved patients in the treatment group, divided by the proportion of improved patients in the control group.[citation needed] The same term has been used in marketing.[1]

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  1. ^ Berdie, D. R.; Anderson, J. F. (1976). "Mail Questionnaire Response Rates: Updating Outmoded Thinking". The Journal of Marketing. 40 (1): 71–73. doi:10.2307/1250681. JSTOR 1250681.

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