Open AccessKinetics of postdiagnosis platelet count with overall survival of pancreatic cancer: a counting process approach
Author(s) -
Xiao Yuanyuan,
Xie Hua,
Xie Zhihui,
Shao Zhenyi,
Chen Wen,
Qin Guoyou,
Zhao Naiqing
Publication year - 2016
Publication title -
cancer medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.403
H-Index - 53
ISSN - 2045-7634
DOI - 10.1002/cam4.644
Subject(s) - medicine , proportional hazards model , retrospective cohort study , survival analysis , platelet , population , thrombocytosis , gastroenterology , oncology , nuclear medicine , surgery , environmental health
The association between long‐term variation of postdiagnosis platelets and survival of pancreatic cancer ( PC ) has never been discussed by using dynamic survival analysis method. In this retrospective study, we analyzed 311 histologically confirmed PC patients identified from a mega population‐based electronic inpatients database from 2012 to 2013 in China. Counting process approach was applied to restructure the original survival data, the association between post‐diagnosis platelet count and overall survival ( OS ) of PC was evaluated by multiple failure‐time Cox proportional hazards model. After counting process adjustment, multiple failure‐time Cox proportional hazards model revealed that, regardless of the treatment modalities PC patients received, postdiagnosis thrombocytopenia was prominently associated with OS , compared with PC patients with normally ranged platelet count, the HR s ranged from 2.04 (95% CI : 1.14–3.67) to 10.82 (95% CI : 2.63–44.54), and this inverse association was robust based on further sensitivity analysis. On the contrary, the association between thrombocytosis and OS of PC tended to be inconclusive. Our findings suggested that postdiagnosis thrombocytopenia was associated with significantly compromised survival among PC patients from this large retrospective cohort. Underlying mechanisms behind this association should be further investigated.