Abstract
PURPOSE: We investigated the clinical validity of patients’ estimation of overall treatment burden. This measure was expected to be responsive to the wide spectrum of reactions on treatment and thus less precise for specific effects. PATIENTS AND METHODS: After the first chemotherapy within a randomized, double-blind trial of the prophylaxis for delayed emesis (SAKK 90/95), 249 patients documented nausea and vomiting daily for 6 days. Over the whole period, they estimated nausea/vomiting (N/V) burden and overall treatment burden by linear analog-self assessment (LASA) indicators and documented other side effects. RESULTS: At day 6, the two burden indicators were moderately correlated (r = 0.58) in accordance with their different concepts. No, partial, or total control of delayed emesis (days 2 to 6) was reflected in a consistent pattern by both indicators, with a stronger and more significant effect (P < .001) on changes in N/V burden than overall treatment burden. In contrast, toxicity other than N/V, as...
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