Survival and Trends in Annualized Hazard Function by Age at Diagnosis Among Chinese Breast Cancer Patients Aged ≤40 Years: Case Analysis Study

Jun Wang   ^{1 *} , MD ;   Ting Luo   ^{2 *} , MD ;   Zhong-zheng Xiang   ^{1 *} , MD ;   Ming-min He   ¹ , MD ;   Yuan-yuan Zeng   ¹ , MD ;   Tian Yang   ¹ , MD ;   Xiao-yuan Wei   ¹ , MD ;   Siting Yu   ¹ , MD ;   Ze-lei Dai   ¹ , MD ;   Ning-yue Xu   ¹ , MD ;   Chen-feng Tan   ¹ , MD ;   Lei Liu   ^{1 *} , MD

¹ Department of Head and Neck Oncology, West China Hospital, Sichuan University, Chengdu, China

² Breast Disease Center, Cancer Center, West China Hospital, Sichuan University, Chengdu, China

*these authors contributed equally