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Proportion of older adults hospitalized during chemotherapy by presence of number of identified risk factors among development and validation cohort (using original cutoff values of risk factors; 0-2, 3, and 4-7). Risk factors included GI cancer, comorbidity, polypharmacy, below normal creatinine clearance and albumin levels, requiring assistance with activities of daily living, and having someone available to take them to the doctor most or all of the time.
