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Manuscript. Source at http://dx.doi.org/10.1136/oemed-2016-104170 ; Objective: To investigate external-cause mortality among 21 609 Norwegian male military peacekeepers deployed to Lebanon during 1978–1998. Methods: The cohort was followed from first day of deployment through 2013, and mortality during deployment and post discharge was assessed using standardized mortality ratios (SMR) calculated from national rates in Norway. Poisson regression was used to see the effect of high- versus low-conflict exposure. Results: For the total cohort, external-cause mortality was within expected values during deployment (SMR=0.80) and post discharge (SMR=1.05). In the low-conflict exposure group, a lower mortality from all external causes (SMR=0.77), transport accidents (SMR=0.55), and accidental poisoning (SMR=0.53) was seen. The high-conflict exposure group showed an elevated mortality from all external causes (SMR=1.20), transport accidents (SMR=1.51), and suicide (SMR=1.30), but these risks were elevated only during the first 5 years after discharge. This group also showed elevated mortality from all external causes (RR=1.49), and for transport accidents (RR=3.30) when compared with the low-conflict exposure group. Conclusions: Overall external-cause mortality among our peacekeepers was equal to national rates during deployment and post discharge. High conflict exposure was associated with elevated mortality from all external causes, transport accidents, and suicide during the first 5 years after discharge from service.

ObjectiveThis study aimed to determine occupational variations in the incidence of breast cancer in the population-based cohort of Nordic Occupational Cancer Study (NOCCA).MethodsThe study included long-term follow-up data from almost 7.5million Nordic women. Participants were assigned to one of the 54 occupational categories based on census records at the ages of 30-64years. Sixty-two thousand cases of breast cancer were identified through record linkages between nationwide cancer registries in Finland, Sweden, Norway, Denmark, and Iceland, followed up between 1961 and 2005. Country-specific standardized incidence ratios (SIRs) with 95% confidence intervals were estimated.ResultsOverall, the highest risk elevations were seen among military personnel (SIR 1.58, 95% CI 1.03-2.32), dentists (SIR 1.43, 95% CI 1.31-1.56), and physicians (SIR 1.35, 95% CI 1.26-1.46). The lowest risks were observed among gardeners (SIR 0.76, 95% CI 0.74-0.78), farmers (SIR 0.80, 95% CI 0.78-0.82), and woodworkers (SIR 0.75, 95% CI 0.70-0.81). Welders, tobacco workers, and painters had higher SIRs for breast cancer diagnosed at age ; Peer reviewed

Published version, source at http://doi.org/10.1016/j.jaad.2016.03.033 . License CC BY-NC-ND 4.0 . ; Background The age-adjusted incidence of cutaneous squamous cell carcinoma (cSCC) in the Nordic countries has increased during the last 60 years, and the identification of occupational variation in the relative risk of cSCC may have preventive implications. Objective We sought to describe variation in the relative risk of cSCC between occupational categories in Finland, Iceland, Norway, and Sweden. Methods This is a historical prospective cohort study based on record linkages between census data for 12.9 million people and cancer registry data from 1961 to 2005. Standardized incidence ratios for cSCC were estimated for 53 occupational categories with the cSCC incidence rates for the national population of each country used as reference. Results During follow-up, 87,619 incident cases of cSCC were reported to the national cancer registries. In all countries combined, significant increased standardized incidence ratios were observed among seamen, military personnel, public safety workers, technical workers, teachers, transport workers, physicians, dentists, nurses, other health workers, religious workers, clerical workers, administrators, and sale agents (standardized incidence ratios between 1.08 and 1.77). Limitations Information on occupation was based on 1 point in time only. Conclusion The occupational variation of the relative risk of cSCC might be associated with socioeconomic factors, and to some extent to occupational exposures.

BACKGROUND: The age-adjusted incidence of cutaneous squamous cell carcinoma (cSCC) in the Nordic countries has increased during the last 60 years, and the identification of occupational variation in the relative risk of cSCC may have preventive implications. OBJECTIVE: We sought to describe variation in the relative risk of cSCC between occupational categories in Finland, Iceland, Norway, and Sweden. METHODS: This is a historical prospective cohort study based on record linkages between census data for 12.9 million people and cancer registry data from 1961 to 2005. Standardized incidence ratios for cSCC were estimated for 53 occupational categories with the cSCC incidence rates for the national population of each country used as reference. RESULTS: During follow-up, 87,619 incident cases of cSCC were reported to the national cancer registries. In all countries combined, significant increased standardized incidence ratios were observed among seamen, military personnel, public safety workers, technical workers, teachers, transport workers, physicians, dentists, nurses, other health workers, religious workers, clerical workers, administrators, and sale agents (standardized incidence ratios between 1.08 and 1.77). LIMITATIONS: Information on occupation was based on 1 point in time only. CONCLUSION: The occupational variation of the relative risk of cSCC might be associated with socioeconomic factors, and to some extent to occupational exposures.

Submitted manuscript version. Published version available in European Journal of Cancer (2017), 87, p. 92-100. ; Background: Early-onset prostate cancer is often more aggressive and may have a different etiology than later-onset prostate cancer, but has been relatively little studied to date. We evaluated occupation in relation to early-onset and later-onset prostate cancer in a large pooled study. Methods: We used occupational information from census data in five Nordic countries from 1960-1990. We identified prostate cancer cases diagnosed from 1961-2005 by linkage of census information to national cancer registries and calculated standardized incidence ratios (SIRs) separately for men aged 30-49 and those aged 50 or older. We also conducted separate analyses by period of follow-up, 1961-1985 and 1986-2005, corresponding to pre- and post-prostatespecific antigen (PSA) screening. Results: For early-onset prostate cancer (n=1,521), we observed the highest SIRs for public safety workers (e.g., firefighters) [SIR=1.71, 95% confidence interval (CI): 1.23-2.31] and military personnel (SIR=1.97, 95% CI: 1.31-2.85). These SIRs were significantly higher than the SIRs for later-onset disease (for public safety workers, SIR=1.10, 95% CI: 1.07-1.14, and for military personnel, SIR=1.09, 95% CI: 1.05- 1.13; pheterogeneity=0.005 and 0.002, respectively). Administrators and technical workers also demonstrated significantly increased risk for early-onset prostate cancer, but the SIRs did not differ from those for later-onset disease (pheterogeneity>0.05). While our early-onset finding for public safety workers was restricted to the post-PSA period, that for military personnel was restricted to the pre-PSA period. Conclusion: Our results suggest that occupational exposures, particularly for military personnel, may be associated with early-onset prostate cancer. Further evaluation is needed to explain these findings.