Abstract
Purpose
Associations between subjective life expectancy (SLE) and a variety of factors are well documented, but the relationship regarding cancer is limited. The purpose of this study was to disclose this potential relationship and identify the covariates that might influence this relationship.
Methods
Data were extracted from the China Health and Retirement Longitudinal Study (CHARLS), and a sample of 448 cancer survivors and 43,795 individuals without cancer were analyzed. Multilevel mixed-effects logistic regression was performed to examine the SLE associated with cancer survivors and participants without cancer after controlling for demographic, socioeconomic, health-related, and psychosocial factors.
Results
The findings revealed that cancer survivors had a 39% reduction in longer life expectancy compared to respondents without cancer. Disparities in SLE existed based on diverse individual characteristics. The rate of high SLE in urban citizens was 75% higher compared to that of rural residents, while the rate of high SLE in participants with disability fell by 55%. The rate of high SLE decreased by 22% and 35% in respondents with high blood pressure and diabetes, respectively. The proportion of respondents with high SLE was reduced by 70% when depression was present. Furthermore, the out-of-pocket expenditures of participants with and without cancer showed a significant difference, but discrepancies with respect to SLE among different cancer treatment options were not found.
Conclusion
The more challenging one’s socioeconomic status is and the unhealthier one’s physical and mental conditions are, the lower one’s prospect of subjective life expectancy is. Further work is warranted to confirm the causal association between subjective life expectancy and certain characteristics in cancer survivors.
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Data availability
The data and other items supporting the results in the paper will be made available upon reasonable request to the corresponding author.
Code availability
The corresponding author can be contacted to request a copy of the scripts used to generate the results included in this manuscript.
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Acknowledgements
We thank the CHARLS field team and the research team for their contributions to data collection and management.
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ZC and GG planned and designed the study. DZ and ZC acquired and analyzed the data. DZ, ZC and XH developed the analyses. All authors contributed to the advanced draft of the manuscript and approved the final version of the paper.
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The CHARLS study was approved by the ethics committee of Peking University Health Science Center, Beijing, China. The requirement for informed consent was waived since the collected data were already anonymous.
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Chen, Z., Zhu, D., Hu, X. et al. Subjective life expectancy and associated factors among cancer survivors over 45 years old: evidence from the CHARLS. Qual Life Res 30, 1571–1582 (2021). https://doi.org/10.1007/s11136-020-02751-8
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DOI: https://doi.org/10.1007/s11136-020-02751-8