Minimally important differences for interpreting EORTC QLQ-C30 change scores over time: A synthesis across 21 clinical trials involving nine different cancer types

Jammbe Musoro, Corneel Coens, Mirjam A. G. Sprangers, Yvonne Brandberg, Mogens Grøenvold, Hans‐Henning Flechtner, Kim Cocks, Galina Velikova, Linda Dirven, Elfriede Greimel, Susanne Singer, Katarzyna Pogoda, Eva‐Maria Gamper, Samantha C. Sodergren, Alexander M.M. Eggermont, Michael Koller, Jaap C. Reijneveld, Martin Taphoorn, Madeleine King, Andrew Bottomley