Multiple Myeloma: Validation of the Values and Preferences Elicitation Questionnaire- Cure and Survival Preference Scale (VPEQ-CSPS)

Abstract

BackgroundWith the emergence of many novel therapies, the treatment decisions for multiple myeloma (MM) are increasingly guided by concerns of quality of life, achievement of cancer-free remission, living a longer overall survival, and a relentless search for a cure; however, the impact of various decision-making factors on patients’ actual therapy choices and the patients’ desire for cure and survival is mainly unknown. The lack of a valid and reliable measure for uncovering patients’ preferences for cure and survival makes it more challenging to put this factor into the actual treatment decision equation. PurposeThis study examined the psychometric properties of the Values and Preferences Elicitation Questionnaire-Cure and Survival Preference Scale (VPEQ-CSPS) instrument. MethodsThe VPEQ-CSPS instrument was deployed using an anonymous Qualtrics online survey to patients diagnosed with MM within the network of International Myeloma Foundation online patient support groups across the United States. One hundred seventy-four (N = 174) valid responses were obtained and used to examine the validity and reliability of the VPEQ-CSPS. ResultsExploratory factor analysis (EFA) revealed a Kaiser-Meyer-Olkin value of 0.72 indicating excellent sample adequacy. A statistically significant Bartlett's test of sphericity (P < .001) indicated significant correlations among the variables of the dataset to conduct the EFA. The internal consistency coefficients indicated adequate reliability of the instrument with Cronbach's alpha value at 0.80. The EFA and parallel analysis revealed the 5-item VPEQ-CSPS as a valid and reliable unidimensional scale that can be used by oncology clinicians to elicit their patient's preferences for cure and survival. This new instrument has the potential to contribute to the achievement of shared decision-making for myeloma treatment decisions.