• Military medicine · Feb 2020

    A 5-Year Continued Follow-up of Cancer Risk and All-Cause Mortality Among Norwegian Military Peacekeepers Deployed to Kosovo During 1999-2016.

    • Leif Aage Strand, Jan Ivar Martinsen, and Einar Kristian Borud.
    • Norwegian Armed Forces Joint Medical Services, Institute of Military Medicine and Epidemiology, Sessvollmoen Garnison, N-2018 Sessvollmoen, Norway.
    • Mil Med. 2020 Feb 12; 185 (1-2): e239-e243.

    IntroductionIn 2012, Norwegian news media reported on cases of brain cancer among Norwegian peacekeeping troops who served in Kosovo, allegedly caused by exposure to depleted uranium fired during airstrikes before the peacekeepers arrived in 1999. A first study followed 6076 military men and women with peacekeeping service in Kosovo during 1999-2011 for cancers and deaths throughout 2011. The study did not support to the idea that peacekeeping service in Kosovo could lead to increased risk of brain cancer or other cancers. However, the average time of follow-up (10.6 years) was rather short for cancer development; therefore the aim of the present study was to evaluate cancer risk and general mortality in an updated cohort after 5 years of additional follow-up.Materials And MethodsThe updated cohort consisted of 6,159 peacekeepers (5,884 men and 275 women) who served in Kosovo during 1999-2016 and were followed for cancer incidence and mortality from all causes combined throughout 2016. We calculated standardized incidence ratios (SIR) for cancer and standardized mortality ratios (SMR) from national population rates. Poisson regression was used to assess the effect of length of service (<1 year vs. ≥1 year) on cancer risk.ResultsWe observed 149 cancer cases and 75 deaths in the updated cohort. Observed cancer incidence did not exceed national rates. In men, the SIR for brain cancer was 0.73 (95% confidence interval (CI) 0.32-1.44), based on eight cases, while the risk of colon cancer was lowered (SIR = 0.14, 95% CI 0.00-0.79). The Poisson regression showed no effect of service duration on all-site cancer incidence. Mortality from all causes combined was lower than expected (SMR = 0.62, 95% CI 0.49-0.78) and in accordance with a "healthy soldier effect".ConclusionThe extended follow-up did not give support to the suggestion that peacekeeping service in Kosovo could lead to increased risk of cancer.© Association of Military Surgeons of the United States 2019. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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