Key result
Sea pilot or boatman employment shows no excess all-cause or IHD mortality vs general population.
Why the study?
Does occupation as a sea pilot or boatman increase mortality from ischaemic heart disease in Swedish men?
Cohort (n=1,323)
Does occupation as a sea pilot or boatman increase mortality from ischaemic heart disease in Swedish men?
Effect estimate: SMR 101 (95% CI 99-112)
Occupation as a sea pilot or boatman in Sweden was not associated with excess mortality from ischaemic heart disease between 1951 and 1984.
A cohort of 1455 sea pilots and boatmen employed after 1921 was established. Those identified and alive in 1951 (n = 1323) were linked to the Swedish cause of death register 1951-84. In 21 352 person-years 383 deaths were observed among sea pilots compared with 379.3 expected (SMR = 101;95% CI between 99 and 112) and in 12,127 person-years the observed number of deaths among boatmen was 136, expected 135.9 (SMR = 100) when Swedish men were used as a reference population. For ischaemic heart disease (IHD) (ICD-8: 410-414) the SMR was equal to 96 (obs = 131, exp = 137.2) for sea pilots and 91 (obs = 44, exp = 48.4) for boatmen. No trend over time or geographical differences could be observed. A healthy worker effect could not explain why there was no excess mortality from IHD.
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Nyström et al. (1990) conducted a cohort in Mortality from circulatory diseases and ischaemic heart disease (n=1,323). Employment as sea pilots or boatmen vs. Swedish men (general population) was evaluated on All-cause mortality (SMR 101, 95% CI 99-112). Employment as sea pilots or boatmen in Sweden was not associated with excess all-cause mortality (SMR 101; 95% CI 99-112) or ischaemic heart disease mortality compared to the general male population.
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