The prevalence of type 1 diabetes mellitus among 15–34-year-aged Lithuanian inhabitants during 1991–2010

AimsTo summarize the data on the prevalence of type 1 diabetes mellitus among 15–34-year-aged Lithuania inhabitants (1991–2010).MethodsNew prevalent cases consist of growing-up patients with diabetes onset in childhood, i.e., up to 14 years, new onset 15–34-year-aged type 1 diabetic patients Lithuanian inhabitants, and immigrants. The data on type 1 diabetes was collected with the help of general practitioners and regional endocrinologists in Lithuania.ResultsOn 31 December 1991, there were 1202 adolescent and adult 15–34-year-aged patients with type 1 diabetes mellitus or 103.59 per 100,000 inhabitants of the same age group (95% Poisson CI 97.90–109.62), and at the end of 2010 – 1533 or 187.80 (178.63–197.44), respectively in Lithuania. During 19-year period the mean increase of type 1 diabetic patients was 1.25 ± 1.94% per year or 1.47 ± 2.74 per 100,000 inhabitants per mean year of the study period (for males 1.42 ± 2.14% or 1.69 ± 3.05/100,000 and for females 1.05 ± 1.99%, or 1.24 ± 2.92/100,000). Regression-based linear trends showed that the prevalence of type 1 diabetes mellitus in 15–34-year-age group had a tendency to increase among males (r = 0.953; p < 0.001) and females (r = 0.970; p < 0.001). The age adjusted prevalence frequencies for males and females in 1991 were correspondingly 102.81/100,000 and 104.55/100,000, and in 2010 – 193.75 and 182.01.ConclusionThe prevalence of type 1 diabetes mellitus among 15–34-year-age males and females had a tendency to increase during 1991–2010.