Journals / Retina-Vitreus / 2010 / Cilt: 18 - Sayı: 2

Evaluation of the effect of diabetes mellitus type 1 and its metabolic control on retinal nerve fiber layer thickness

Tip 1 diabetes mellitus ve metabolik kontrolünün retina sinir lifi tabakası kalınlığına etkisinin değerlendirilmesi

Pages
149–153
DOI
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⚡ TL;DR(Too Long; Didn't Read)

However the negative correlation with HbA1c suggests that poor metabolic control may cause a progressive defect in RNFL.

📌 3 Key Takeaways

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Objective & Hypothesis:Purpose: To evaluate the retinal nerve fiber layer (RNFL) thickness changes in type 1 Diabetes Mellitus (DM) patients without diabetic retinopathy (DR) and the effect of blood glucose regulation .
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Key Findings & Data:Materials and Methods: The RNFL thickness measured by optical coherens tomography (OCT) of type 1 DM patients without DR according to ophthalmological examination (n=98) are compared with age-sex matched healthy subjects (n=49) .
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Conclusion & Impact:However the negative correlation with HbA1c suggests that poor metabolic control may cause a progressive defect in RNFL.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Purpose: To evaluate the retinal nerve fiber layer (RNFL) thickness changes in type 1 Diabetes Mellitus (DM) patients without diabetic retinopathy (DR) and the effect of blood glucose regulation . Materials and Methods: The RNFL thickness measured by optical coherens tomography (OCT) of type 1 DM patients without DR according to ophthalmological examination (n=98) are compared with age-sex matched healthy subjects (n=49) . Fasting blood glucose and HbA1c levels measured via analysis of venous blood samples obtained after 12 hours of starvation period are evaluated for the assessment of the metabolic regulation. Results: The mean RNFL thickness was 100.00±11.93 m in diabetic patients and 103.79±6.45 m in the control group, however this difference was not statistically significant. The comparison of RNFL thickness in superior, nasal, inferior and temporal quadrants revealed also no statistically significant change. The mean duration of DM was 60.76±50.41 months and analysis according to duration demonstrated no statistically significant difference of RNFL thickness among patients with duration of DM for 1-60 months, 61-120 months and those with duration of DM for >120 months (p>0.05). The mean fasting blood glucose was 237.46±119.22 mg/dl and the mean HbA1c was 8.77±1.94%. The HbA1c levels showed a negative correlation with RNFL thickness (koeff= - 0.49 p<0.001) Conclusion: The RNFL thickness did not show a statistically significant difference between healthy subjects and patients with type 1 DM without DR. However the negative correlation with HbA1c suggests that poor metabolic control may cause a progressive defect in RNFL.

Özet

Amaç: Tip 1 Diabetes Mellitus (DM) tanısıyla izlenen ve diabetik retinopatisi (DR) bulunmayan olgularda retina sinir lifi tabakası (RSLT) kalınlığındaki değişiklikleri ve metabolik kontrolün etkisini değerlendirmek. Gereç ve Yöntem: Oftalmolojik muayenesinde DR bulgusu olmayan Tip 1 DM’li 98 olgu ile benzer yaş ve cinsiyet dağılımı gösteren 49 sağlıklı bireyin optik koherens tomografi (OKT) ile alınan RSLT kalınlık ölçümleri karşılaştırıldı. Metabolik kontrolün değerlendirilmesinde 12 saatlik bir açlık periyodundan sonra alınan venöz kandaki açlık kan şekeri (AKŞ) ve HbA1c düzeyleri kullanıldı. Bulgular: Ortalama RSLT kalınlığı DM’li olgularda 100.00±11.93 m, kontrol grubunda 103.79±6.45 m olarak saptanmış ancak bu fark istatisktiksel olarak anlamlı bulunmamıştır. Süperior, nazal, inferior ve temporal kadranlardaki RSLT kalınlıkları karşılaştırıldığında da istatistiksel olarak anlamlı değişiklik tespit edilememiştir. Tip 1 DM olgularının ortalama DM süresi 60.76±50.41 ay olarak bulunmuş ve bu süreye göre gruplanarak yapılan değerlendirmede DM süresi 1-60 ay olan olgular ile 61- 120 ay ve >120 ay olan gruplar arasında RSLT kalınlığında anlamlı değişiklik saptanmamıştır (p>0.05). DM’li olguların ortalama AKŞ 237.46±119.22 mg/dl ve HbA1c düzeyi 8.77±1.94% idi. İstatistiksel analizde RSLT kalınlığı ile HbA1c düzeyi arasında negatif korelasyon olduğu gösterilmiştir (koeff=-0.49 p<0.001). Sonuç: RSLT kalınlığı DR’si olmayan tip 1 DM’li olgularda sağlıklı bireylere göre istatistiksel olarak anlamlı bir farklılık göstermemektedir. Ancak HbA1c ile negatif korelasyonu kötü metabolik kontrolün ilerleyici bir hasara yol açabileceğini düşündürmektedir.

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Cite This Article

GÖNÜL, Ş., ÖZTÜRK, T. B., ŞAHİN, A., ÖZKAĞNICI, A., OKUDAN, S. (2010). Evaluation of the effect of diabetes mellitus type 1 and its metabolic control on retinal nerve fiber layer thickness. Retina-Vitreus, Cilt: 18 - Sayı: 2, 149–153. https://ajindex.com/articles/305163

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