Incidence of myocardial infarction and associated mortality varies by latitude and season: findings from a Swedish Registry Study.

We investigated whether the incidence of death following myocardial infarction (MI) varied by season and latitude in the Swedish population.We studied deaths following MI from January 1987 to December 2009, using the Swedish National Cause of Death Register. County of residence was used to determine latitude and population density. An extension of Poisson regression was used to study the relationship between risk of death following MI with age, latitude, time (from 1987), population density and calendar days.Over the study period, there was a secular decrease in the incidence of MI-related death. In men, MI-related death incidence increased by 1.3% [95% confidence interval (CI)=1.1-1.5] per degree of latitude (northwards). In women, MI-related death incidence increased by 0.6% (95% CI=0.4-0.9) per degree of latitude. There was seasonal variation in the risk of MI-related death with peak values in the late winter and a nadir in the summer months in both the north and the south of Sweden. Findings were similar with incident MI as the outcome.The incidence of MI-related death varied markedly by season and latitude in Sweden, with summer months and more southerly latitude associated with lower rates than winter months and more northerly latitude.

Lorentzon, Mattias,1970Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition,Institute of Medicine, Department of Internal Medicine and Clinical Nutrition(Swepub:gu)xlomat (author)
Kanis, John A (author)
McCloskey, Eugene (author)
Johansson, Helena (author)
Göteborgs universitetInstitutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition (creator_code:org_t)

In:Journal of public health (Oxford, England): Oxford University Press (OUP)42:41741-38501741-3842

By the author/editor: Harvey, Nicholas ...; Lorentzon, Matti ...; Kanis, John A; McCloskey, Eugen ...; Johansson, Helen ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cardiac and Card ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Endocrinology an ...

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