The visual analog scale (VAS) demonstrates comparable validity for perennial allergic rhinitis (PAR) and nonallergic rhinitis (NAR) severity and quality-of-life (QoL) impairment, according to a study ...
The feasibility, validity and reliability of the Time Trade-Off (TTO) and Visual Analogue Scale (VAS) methods in obtaining preference values for health states were compared in a random sample of the ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results