Data demonstrating the efficacy of behavioral methods for treating dysphagia are in short supply. This paper defines efficacy and distinguishes it from efficiency. It highlights the attitudes, measures, decisions, and data essential to the design of clinical trials. The need for additional outcome measures and for establishing appropriate treatment intensities are emphasized.
Key words Dysphagia - Treatment - Efficacy - Swallowing therapy - Deglutition - Deglutition disorders