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 ...

A method is devised which shows how to determine quickly, but exactly, the discriminant and criterion-related validity of composite measures. It is also shown how the same method can be used to do ...

Background Risk factors among overhead athletes have been investigated in many studies. The rotator cuff external rotator weakness is associated with an increased probability of substantial shoulder ...