Abstract
Purpose
Comprehensive (qualitative and quantitative) assessments of the 12-item functional assessment of anorexia/cachexia therapy (FAACT) anorexia/cachexia subscale (A/CS) and relevant subscales were undertaken for use in constructing potential endpoints in clinical trials of non-small cell lung cancer (NSCLC) with involuntary weight loss.
Methods
Eleven participants (≥ 18 years) from six clinical sites with a diagnosis of stage III unresectable or stage IV NSCLC and involuntary weight loss (either ≥ 5% body weight loss within six months prior to screening or screening BMI < 20 kg/m2) were interviewed to evaluate the content validity of the A/CS domain. A psychometric evaluation was conducted on the A/CS domain, and symptoms and concerns subscales, using data from previously completed phase III clinical trials (ROMANA1 [N = 474] and ROMANA2 [N = 488]).
Results
Anorexia-related symptoms were highly relevant to participants and had important impacts on their lives including energy levels, and physical, social, and psychological functioning. The majority of participants endorsed the A/CS domain items and found them to be easily understood, relevant, and comprehensive. Confirmatory factor analyses established that the A/CS symptoms and concerns subscales provided an acceptable fit as single factor models in ROMANA1 and ROMANA2. Reliability, validity, and responsiveness were established for the 12item A/CS domain, 5item anorexia symptoms subscale, and 4-item anorexia concerns subscale.
Conclusions
These scales have good content validity, favorable psychometric properties, and can be used for characterizing the effect of treatment on anorexia symptoms and/or anorexia-related concerns in patients with NSCLC.
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Gelhorn, H.L., Gries, K.S., Speck, R.M. et al. Comprehensive validation of the functional assessment of anorexia/cachexia therapy (FAACT) anorexia/cachexia subscale (A/CS) in lung cancer patients with involuntary weight loss. Qual Life Res 28, 1641–1653 (2019). https://doi.org/10.1007/s11136-019-02135-7
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DOI: https://doi.org/10.1007/s11136-019-02135-7