First, this study is the first to pay attention to the influence of marital status on survival of patients with soft tissue sarcoma. Second, the present study is the first to show that marital status can also serve as an independent predictors of survival in soft tissue sarcoma patients. Further, we proposed corresponding coping strategies according to the causes.
Abstract
Background
Marital status serves as an independent prognostic factor for survival in a variety of cancers. However, its prognostic impact on soft tissue sarcoma (STS) has not yet been established.
Objective
To investigate the impact of marital status on survival outcomes among STS patients.
Methods
A total of 18 013 STS patients diagnosed between 2004 and 2015 were extracted from Surveillance, Epidemiology, and End Results (SEER) database. The marital status was classified into married, divorced, widowed, and single. Kaplan‐Meier analysis and multivariate Cox proportional hazards regression analysis were conducted to establish the impact of marital status on the overall survival (OS) and cancer‐specific survival (CSS). Subgroup analyses were conducted based on age, SEER historic stage and surgery condition. Propensity score matching (PSM) was used to perform a 1:1 matched‐pair analysis to minimize the group differences caused by covariates.
Results
Married patients enjoyed better 5‐year overall survival (OS) and 5‐year cancer‐specific survival (CSS), compared with patients who were divorced, widowed, and single, respectively. Multivariate Cox proportional hazards regression analysis revealed that marital status was an independent prognostic and protective factor for survival among STS patients, and unmarried status was associated with higher mortality hazards for both OS and CSS. Additionally, widowed individuals had the highest risks of overall and cancer‐specific mortality compared to other unmarried groups. In the subgroup analyses, similar associations were also found. Furthermore, marital status still remained an independent prognostic and protective factor for both OS and CSS even in 1:1 matched‐pair analysis.
Conclusions
Marital status was an independent prognostic and protective factor for survival for STS patients. Widowed patients suffered the highest death risks among the unmarried groups.
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