Terwee, Caroline B.; Prinsen, Cecilia A.C.; Chiarotto, A.; Westerman, M. J.; Patrick, Donald L.; Alonso Caballero, Jordi; Bouter, Lex M.; De Vet, Henrica C. W.; Mokkink, Lidwine B.
(Springer, 2018)
Background: Content validity is the most important measurement property of a patient-reported outcome measure (PROM) and the most challenging to assess. Our aims were to: (1) develop standards for evaluating the quality ...