时间 (年)126172605224932477323092304415951616552752864234Anastrozole Exemestane0604020011001102110571050299498438738864595614519620661418# At Risk0Anastrozole 2687Exemestane 2687( )层 分层 HR: 1.04 (0.85-1.27) p = 0.726( )分层 HR: 0.99 (0.79-1.23) p = 0.896