This trial uses blood tests and questionnaires to study how well participants with head and neck cancer that has spread to other places in the body adhere to swallowing exercises to prevent future disease. Using blood tests to study cytokines (proteins related to the immune system) may help doctors learn if certain levels of cytokines affect whether or not side effects occur and if they put participants at risk for future disease. Questionnaires may help doctors learn about the reasons head and neck cancer participants may or may not follow the swallowing exercises that they are asked to perform after receiving radiation treatments.
PRIMARY OBJECTIVES: I. To determine whether illness perceptions significantly predict adherence to swallowing exercises at 6 months after the end of radiation. II. To determine whether sickness behaviors (depression, fatigue, pain)'s effect on illness perceptions are mediated by pro-inflammatory cytokines. III. To determine whether social support moderates the impact of coping on appraisal of coping. SECONDARY OBJECTIVES: I. As a secondary aim, to determine the feasibility and utility of cardiac impedance pre-ejection period measurement as a corollary measure for depression and distress. II. As a secondary aim, to identify potential genetic markers for swallowing dysfunction which has developed by the 6-month follow-up. OUTLINE: Participants provide blood samples prior to and at the 6-month visit after receiving radiation therapy. Participants also complete questionnaires either at home, in clinic, or via internet over 30 minutes prior to receiving radiation therapy and within 14 days of blood sample collection. After completion of study, participants are followed up periodically for up to 2 years.
Study Type
OBSERVATIONAL
Enrollment
471
Provide blood samples
Ancillary studies
M D Anderson Cancer Center
Houston, Texas, United States
RECRUITINGAdherence to swallowing exercises
The primary analytic approach is to use linear mixed models to determine whether illness perceptions significantly predict adherence 6 months. The study will estimate and test the illness perception subscale scores' relationship to adherence using a linear mixed model. In the model, the dependent variable is the patient's self-reported adherence score and independent variables include illness perception, follow-up assessment time point and other covariates such as demographic and medical variables, depression, pain, fatigue, emotional coping, objective coping, appraisal of coping, stress, and lack of social well-being.
Time frame: Up to 6 months
Illness perceptions
The study's statistical tool is mediation analysis: the independent variables are the sickness behaviors (depression, fatigue, pain); the mediators are the cytokine levels, and the outcome variable is illness perception. The study will test the mediator effects based on the product of coefficients method, rather than the classical Baron \& Kenny causal steps tests, since the former approach has better statistical power. The study will conduct both single-mediator analysis for each of the mediators, and multiple-mediator analysis with all mediators in the mediating process
Time frame: Up to 6 months
Effect of social support on coping
The moderating effect of social support on coping and appraisal of coping is the statistical equivalent of testing the two-way interaction between these variables and the social support variable. Multivariate linear regression will be used, in which the dependent variable is appraisal of coping at 6 months follow-up, and independent variables include the emotion-focused coping and action-focused sub scales, social support, and their two-way interactions. In the regression, the study will control for baseline variables. In addition, we will also apply the linear mixed model to investigate the moderating effect of these variables longitudinally. The mixed model naturally accounts for the correlation of repeated measures at baseline and 6 months follow-up.
Time frame: Up to 6 months
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