Exploring the Relationship between Diarrhea and Fatigue that can occur during Cancer Treatment: Using Structural Equation Modeling.

OBJECTIVE: To examine the relationship of the symptoms of diarrhea and fatigue by testing a model that included multiple dimensions of the cancer related-symptom experience. METHODS: A secondary data analysis was conducted on data from the self-reports of 102 cancer patients co experiencing diarrhea and fatigue during treatment at a comprehensive cancer center in the Southeastern United States. Structural equational modeling was employed to examine the relationship between the 2variables. Fatigue and diarrhea were assessed using items from the Cancer Symptom Scale. RESULTS: The structural model results showed that (a) the model fit was adequate (b) diarrhea explained 7% of the variance in fatigue, and (c) the structural or path coefficient between diarrhea and fatigue was significant (0.267; p<0.05). Diarrhea had the strongest effect on fatigue interference (0.251). CONCLUSION: Diarrhea is a potential contributing factor to the symptom of fatigue and a potential target for interventions to prevent and ameliorate fatigue.

Validation of the Spanish version of the Cancer Symptom Scale in Hispanic cancer patients.

AIM: To assess the validity of the translated Spanish Cancer Symptom Scale. BACKGROUND: Instruments to facilitate comprehensive and objective assessments of the cancer symptom experience in underrepresented populations are essential. METHODS: The Cancer Symptom Scale was translated into Spanish, and a back translation was conducted. During June 2016, a sample of 121 Hispanic Puerto Rican patients with any cancer diagnosis, all undergoing cancer treatments, completed four paper surveys. A subgroup of 15 patients agreed to complete the Spanish Cancer Symptom Scale a second time after a short delay of 1 to 2 hours. Construct validity and reliability (internal consistency via Cronbach alpha and test-retest reliability) was evaluated. RESULTS: All the Intensity Items of the Spanish Cancer Symptom Scale correlated significantly with the matched items on the MD Anderson Symptom Inventory. In a subgroup of 77 participants, each Cancer Symptom Scale subscale total of scores correlated significantly with the total scores from the Functional Assessment of Cancer Therapy-General. Discriminant validity was demonstrated between those receiving chemotherapy and those from post treatment. The Spanish Cancer Symptom Scale internal consistency reliability was 0.98. CONCLUSION: The Spanish Cancer Symptom Scale has excellent evidence of validity and reliability for assessing cancer-therapy-related symptoms.