Causes of death between 1911 - 1950 in a Swedish province with a population characterized by longevity: Effects on life expectancy

Abstract

Aims: Life expectancy in Sweden is among the highest in the world, and the province of Halland has the highest life expectancy in Sweden today. In an earlier paper the authors reported that life expectancy in the province of Halland in the south-west of the country was approx. 3.5 years above the national average between 1911 and 1950. The aim of this study was to explore the influence of different causes of death on life expectancy in Sweden and the distribution of these causes of death in Halland compared with Sweden as a whole during the same period of time. Method: Causes of death between 1911 and 1950 in the whole of Sweden and in Halland were obtained from the archives of Statistics Sweden. A trend analysis was performed on the impact of the various causes of death on life expectancy in Sweden. Calendar year, age, and sex were controlled for in a Poisson model. The distribution and incidence of the most frequent causes of death were compared between Halland and Sweden as a whole. Results: The decreasing mortality risk due to infectious diseases and the simultaneous increase in the risk of mortality from tumours and circulatory diseases contributed most to the change in life expectancy in Sweden. In Halland there was a lower mortality risk in the seven most important causes of death, which accounted for approx 80% of all deaths during the study period. Conclusions: The lower mortality risk from infectious diseases mostly favoured the improvement in life expectancy in Halland up to the mid-1930s. Thereafter, a low mortality risk from tumours and particularly circulatory diseases gained increasing importance although there was always a difference in favour of Halland from the beginning of the study period. Thus, the positive trend in life expectancy that favours Halland today seems to have existed for a long period of time.

Keywords

causes of death historical perspective life expectancy public health Sweden.

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