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Prevalence of retinopathy differs with age at onset of diabetes in a population of patients with Type 1 diabetes
- Kullberg, C (författare)
- Abrahamsson, M (författare)
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- Arnqvist, Hans, 1943- (författare)
- Östergötlands Läns Landsting,Linköpings universitet,Hälsouniversitetet,Cellbiologi,EMK-endokrin
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- Wiley, 2002
- 2002
- Engelska.
- Ingår i: Diabetic Medicine. - : Wiley. - 0742-3071 .- 1464-5491. ; 19:11, s. 924-931
- Tidskriftsartikel (refereegranskat)
Abstract
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- Aim. The VISS study (Vascular complications in South-east Sweden) investigates prevalence and incidence of vascular complications in a population with Type 1 diabetes, from a well-defined geographical area and followed from diag-nosis with HbA1c measurement. Method. The study population comprised all 440 patients with Type 1 diabetes onset before the age of 36 years, onset during 1983-1987, and at the time of onset living within the counties of J÷nk÷ping, Kalmar or ╓sterg÷tland. Retinopathy was examined with fundus photography 1994-1995, and classified according to a modified Airlie House protocol. Results. Fundus photographs from 390 patients were evaluated. In 277 (71%) patients no retinopathy was seen. The prevalence of retinopathy increased from 11% among patients < 5 years old at diabetes onset, to 48% among those 15-19 years old at diabetes onset, and then decreased to 30% for patients 30-35 years old at diabetes onset (P for ?2 for linear trend for all ages 0.017, for age at onset 0-19 yearsP = 0.0003), without corresponding differences in duration or HbA1c between patients with different onset age. Patients with HbA1c in the highest quartile (> 8.3% HbA1c) had a relative risk of 2.4 (95% confidence) interval (CI) 1.7-3.2) of having any retinopathy compared with patients with lower HbA1c, and a relative risk of 7.1 (95% CI 3.0-16.7) of having other forms of retinopathy than microaneurysms. Conclusion. In patients with diabetes duration of 6-13 years, the prevalence of retinopathy is clearly related to glycaemic control. Furthermore, the risk of retinopathy varies with different age at onset, independently of differences in duration or glycaemic control.
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