The most common grade 3 adverse events ( SOX versus CS ) were neutropenia ( 19.5 % versus 41.8 % ) , anemia ( 15.1 % versus 32.5 % ) , hyponatremia ( 4.4 % versus 13.4 % ) , febrile neutropenia ( 0.9 % versus 6.9 % ) , and sensory neuropathy ( 4.7 % versus 0 % ) .