Mortality in type 1 diabetes

A population based nationwide study was carried out in Finland in patients with type 1diabetes mellitus, to examine the different mortality among 10,500 patients with diabetes from an early age (0-14 years) and 6,800 others who developed diabetes later in life (15-29 years). The mean follow-up was 21 years and the study included patients from 1970 to 1999. The study reported an increase in mortality in patients who had developed diabetes at younger ages, with a mortality ratio of 3.6/year for the first group and 2.8/year for the second group, compared with the general population. The mortality from chronic complications from diabetes showed a gradual decrease with time in the early-onset group, whereas in the late-onset group this decrease was not reported. In this second group there was instead a gradual increase in mortality due to acute complications from the disease and to the use of alcohol and drugs.

(Diabetology)

Our comment:

When the onset of diabetes occurs early in life, it produces an increase in premature mortality compared with the general population, but as time passes, the incidence of complications decreases, while in patients with a later onset of diabetes the situation worsens with time, mainly because of acute complications of the disease and the effects of alcohol intake. Other population based studies would be needed to investigate whether these findings can be adapted to other countries too.
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