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Objective: Acute myeloid leukemia (AML) is primarily a malignant disorder affecting the elderly. We aimed to compare the outcomes of different treatment patterns in elderly AML patients and to propose a prognostic scoring system that could predict survival and aid therapeutic decisions. Methods: Patients aged = 60 years who had been diagnosed with AML at 7 hospitals in China were enrolled (n = 228). Treatment patterns included standard chemotherapy, low intensity therapy, and best supportive care (BSC). Results: The early mortality rates were 31%, 6.8%, and 6.3% for the BSC, low intensity therapy, and standard chemotherapy groups, respectively. The complete remission rate of the standard chemotherapy group was higher than that of the low intensity therapy group. The median overall survival (OS) was 561 days and 222 days for the standard chemotherapy and low intensity therapy groups, respectively, and were both longer than that of the BSC group (86 days). Based on multivariate analyses, we defined a prognostic scoring system that enabled classification of patients into 3 risk groups, in an attempt to predict the OS of patients receiving chemotherapies and low intensity therapies. Low and intermediate risk patients benefited more from standard chemotherapies than from low intensity therapies. However, the median OS was comparable between standard chemotherapies and low intensity therapies in high risk patients. Conclusions: Our prognostic scoring system could predict survival and help select appropriate therapies for elderly AML patients. Standard chemotherapy is important for elderly AML patients, particularly for those categorized into low and intermediate risk groups. [ABSTRACT FROM AUTHOR]