Occupational variation in incidence of bladder cancer: a comparison of population-representative cohorts from Nordic countries and Canada
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Occupational variation in incidence of bladder cancer : a comparison of population-representative cohorts from Nordic countries and Canada. / Hadkhale, Kishor; MacLeod, Jill; Demers, Paul A.; Martinsen, Jan Ivar; Weiderpass, Elisabete; Kjaerheim, Kristina; Lynge, Elsebeth; Sparen, Pär; Tryggvadottir, Laufey; Harris, M. Anne; Tjepkema, Michael; Peters, Paul A.; Pukkala, Eero.
In: B M J Open, Vol. 7, No. 8, e016538, 01.08.2017, p. 1-9.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Occupational variation in incidence of bladder cancer
T2 - a comparison of population-representative cohorts from Nordic countries and Canada
AU - Hadkhale, Kishor
AU - MacLeod, Jill
AU - Demers, Paul A.
AU - Martinsen, Jan Ivar
AU - Weiderpass, Elisabete
AU - Kjaerheim, Kristina
AU - Lynge, Elsebeth
AU - Sparen, Pär
AU - Tryggvadottir, Laufey
AU - Harris, M. Anne
AU - Tjepkema, Michael
AU - Peters, Paul A.
AU - Pukkala, Eero
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Objectives: The objective of this study was to compare occupational variation of the risk of bladder cancer in the Nordic countries and Canada.Methods: In the Nordic Occupational Cancer study (NOCCA), 73 653 bladder cancer cases were observed during follow-up of 141.6 million person-years. In the Canadian Census Health and Environment Cohort (CanCHEC), 8170 cases were observed during the follow-up of 36.7 million person-years. Standardised incidence ratios with 95% CI were estimated for 53 occupations in the NOCCA cohort and HR with 95% CIs were estimated for 42 occupations in the CanCHEC.Results: Elevated risks of bladder cancer were observed among hairdressers, printers, sales workers, plumbers, painters, miners and laundry workers. Teachers and agricultural workers had reduced risk of bladder cancer in both cohorts. Chimney-sweeps, tobacco workers and waiters had about 1.5-fold risk in the Nordic countries; no risk estimates for these categories were given from the CanCHEC cohort.Conclusion: We observed different occupational patterns in risk of bladder cancer in Nordic countries and Canada. The only occupation with similarly increased risk was observed among sales workers. Differences in smoking across occupational groups may explain some, but not all, of this variation.
AB - Objectives: The objective of this study was to compare occupational variation of the risk of bladder cancer in the Nordic countries and Canada.Methods: In the Nordic Occupational Cancer study (NOCCA), 73 653 bladder cancer cases were observed during follow-up of 141.6 million person-years. In the Canadian Census Health and Environment Cohort (CanCHEC), 8170 cases were observed during the follow-up of 36.7 million person-years. Standardised incidence ratios with 95% CI were estimated for 53 occupations in the NOCCA cohort and HR with 95% CIs were estimated for 42 occupations in the CanCHEC.Results: Elevated risks of bladder cancer were observed among hairdressers, printers, sales workers, plumbers, painters, miners and laundry workers. Teachers and agricultural workers had reduced risk of bladder cancer in both cohorts. Chimney-sweeps, tobacco workers and waiters had about 1.5-fold risk in the Nordic countries; no risk estimates for these categories were given from the CanCHEC cohort.Conclusion: We observed different occupational patterns in risk of bladder cancer in Nordic countries and Canada. The only occupation with similarly increased risk was observed among sales workers. Differences in smoking across occupational groups may explain some, but not all, of this variation.
U2 - 10.1136/bmjopen-2017-016538
DO - 10.1136/bmjopen-2017-016538
M3 - Journal article
C2 - 28780557
VL - 7
SP - 1
EP - 9
JO - BMJ Open
JF - BMJ Open
SN - 2044-6055
IS - 8
M1 - e016538
ER -
ID: 185232210