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Opium use and risk of pancreatic cancer: A prospective cohort study

Moossavi, S. and Mohamadnejad, M. and Pourshams, A. and Poustchi, H. and Islami, F. and Sharafkhah, M. and Mirminachi, B. and Nasseri-Moghaddam, S. and Semnani, S. and Shakeri, R. and Etemadi, A. and Merat, S. and Khoshnia, M. and Dawsey, S.M. and Pharoah, P.D. and Brennan, P. and Abnet, C.C. and Boffetta, P. and Kamangar, F. and Malekzadeh, R. (2018) Opium use and risk of pancreatic cancer: A prospective cohort study. Cancer Epidemiology Biomarkers and Prevention, 27 (3). pp. 268-273.

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Abstract

Background: We examined the association between opium consumption and pancreatic cancer incidence in a large-scale prospective cohort of the general population in northeastern Iran. Methods: A total of 50,045 adults were systematically followed up (median of 7.4 years), and incident cases of pancreatic cancer were identified. Self-reported data on opium consumption was collected at baseline. Cumulative use (-year) was defined as number of nokhods (a local unit, approximately 0.2 g) of opium consumed per day multiplied by number of years consuming. Adjusted HRs and 95 confidence intervals (CIs) for the association between opium consumption and pancreatic cancer were calculated using Cox proportional hazards regression models. Results: Overall, 54 confirmed cases of pancreatic cancer were identified. Opium use of more than 81 nokhod-years (high cumulative use), compared with never use, was strongly associated with pancreatic cancer even after adjustments for multiple potential confounding factors HR = 3.01; 95% CI, 1.25-7.26. High cumulative consumption of opium was significantly associated with risk of pancreatic cancer after adjusting for cumulative dose of cigarette smoking HR = 3.56; 95% CI, 1.49-8.50. In a sensitivity analysis, we excluded participants (including 2 pancreatic cancer cases) who were recruited within the first 5 years of starting opium consumption; high cumulative use of opium was still associated with pancreatic cancer risk HR = 2.75; 95% CI, 1.14-6.64. Conclusions: Our results showed a positive association between opium consumption and pancreatic cancer. Impact: This is the first prospective large-scale study to show the association of opium consumption with pancreatic cancer as a risk factor. © 2017 American Association for Cancer Research.

Item Type: Article
Additional Information: cited By 0
Uncontrolled Keywords: opiate, adult; Article; cancer epidemiology; cancer incidence; cancer risk; cigarette smoking; cohort analysis; confounding variable; controlled study; disease association; female; follow up; high risk population; human; Iran; major clinical study; male; middle aged; observational study; pancreas cancer; priority journal; prospective study; risk factor; self report; sensitivity analysis; substance use
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Divisions: UNSPECIFIED
Depositing User: GOUMS
Date Deposited: 29 Sep 2018 07:39
Last Modified: 29 Sep 2018 07:39
URI: http://eprints.goums.ac.ir/id/eprint/9704

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