Factors affecting long-survival of patients with esophageal cancer using non-mixture cure fraction model

Zarean, Elaheh. and Azizmohammad Looha, Mehdi. and Amini, Payam. and Mahmood, Mahmoudi. and Azimi, Tara. (2018) Factors affecting long-survival of patients with esophageal cancer using non-mixture cure fraction model. Asian Pacific Journal of Cancer Prevention, 19 (6).


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Objective: Esophageal cancer (EC) is one of the gastrointestinal malignancies with a very high morbidity and mortality rate due to poor prognosis. This study aims to assess the effects of risk factors on survival and cure fraction of patients with EC in a population of Iranian patients using a non-mixture cure fraction model. Methods: This retrospective cohort study was conducted on 127 patients with EC who were diagnosed during 2009-2010 and were followed up for 5 years in East-Azarbaijan, Iran. Stepwise selection and non-mixture cure fraction model were used to find the risk factors of EC survival patients. Results: The mean (±standard deviation) diagnosis age of the EC was 66.92(±11.95). One, three and five-year survival probabilities were 0.44 (95% confidence interval (CI): 0.36-0.54), 0.2 (95% CI: 0.14-0.28) and 0.13 (95% CI: 0.08-0.2) respectively. Female sex (Estimate=-0.99; 95% confidence interval (CI): -1.41,-0.58; p-value<0.001), low level socioeconomic status (Estimate=0.39; 95%CI: 0.12,0.66; p-value=0.043), the group who did not do esophagectomy surgery (Estimate=0.58; 95%CI: 0.17,0.99; p-value=0.005) and unmarried group (Estimate=0.58; 95%CI: 0.11-1.05; p-value=0.015) were found as the significant predictor of survival and cure fraction of the EC patients. Population cure rate was 0.11 (95%CI: 0.07-0.19) and Cure fraction was estimated 5.11 percent. Conclusion: This study found gender, socioeconomic status, Esophagectomy surgery and marital status as the potential risk factors for survival and cure fraction of Iranian EC patients. Moreover, non- mixture cure fraction provides more accurate and more reliable insight into long-term advantages of EC therapy compared to standard classic survival analysis alternatives.

Item Type: Article
Uncontrolled Keywords: Esophageal neoplasms- survival analysis- non-mixture cure fraction models
Subjects: QZ pathology-Neoplasms
QW Microbiology and Immunology
Divisions: Faculty of Health > Department of Epidemiology
Depositing User: Users 1 not found.
Date Deposited: 28 Aug 2018 06:33
Last Modified: 28 Aug 2018 06:33
URI: http://eprints.skums.ac.ir/id/eprint/7036

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