Versteegh, M.

score stuttering section utility impact oases-a-d cancer mapping scale health qlq-c version patient oases-a value study data sets yarus regression model validity result quality table quesal sample qlq-c 30 scores eq -5d utilities dutch research participant measure level breast stuttering severity severity translation journal questionnaire oases-a-d impact scores effect disorder correlation sa scale eq -5d stutter nsclc difference stuttering disorder instrument point qlq-c 30 disutilitie dutch version algorithm cronbach experience psychometric eortc speaker group translation process error mapping algorithm adult assessment ficient ceiling effects floor effects impact scores function mapping function section iv fluency disorders ceiling impact score treatment coef ficients education disutility