BACKGROUNDSymptom management is an essential component of cancer treatment for patients of every culture and nationality. Symptom assessment depends on subjective reporting, mandating linguistically equivalent versions of symptom assessment scales. Because diseaseârelated and treatmentârelated symptoms most often occur in clusters, there is a global need for a standardized multipleâsymptom assessment tool.METHODSThe authors sought to validate the Chinese version of the M. D. Anderson Symptom Inventory (MDASIâC) by enrolling patients who had received various diagnoses of and different types of treatment for cancer (n = 249) in a crossâsectional symptom study conducted at an urban cancer center in China.RESULTSFactor analysis identified 2 underlying constructs, general symptoms and gastrointestinal symptoms, which had Cronbach alpha coefficients of 0.86 and 0.84, respectively. These results were consistent with Englishâ and Japaneseâlanguage MDASI validation studies. Knownâgroup validity was supported by the MDASIâC's ability to detect significant differences in symptom and interference levels according to Eastern Cooperative Oncology Group performance status (ECOG PS; P < 0.001) and chemotherapy status (P < 0.05). Fiftyâfive percent of the study cohort had â„ 1 symptom that was considered severe (score â„ 7 on a 0â10 scale). ECOG PS was strongly associated with symptom burden (total interference score: R2 = 0.26; P < 0.001). Fatigue, sadness, drowsiness, and lack of appetite accounted for most of the variability in the total interference score (R2 = 0.49; P < 0.05).CONCLUSIONSThe authors demonstrated that the MDASIâC is a valid, reliable, and concise tool for measuring symptom severity and interference with functioning in Chinese cancer patients. Cancer 2004. © 2004 American Cancer Society.