Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation
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Randomized Controlled Trial
Testing the measurement equivalence of paper and interactive voice response system versions of the EORTC QLQ-C30.
The objective of this study was to evaluate the measurement equivalence of an interactive voice response system (IVRS) version and the original paper-based version of the EORTC QLQ-C30. ⋯ This analysis provides evidence that the scores obtained from the IVRS version of the QLQ-C30 are equivalent to those obtained with the original paper version except for the insomnia and appetite loss items.