TSH levels linked to diabetic retinopathy development in T2D patients

2. The frequency of DR was 23.8% even in well-controlled patients who met a TIR objective of >70% (n = 1459) and was strongly correlated with TSH (OR = 1.54, 95% CI 1.12-2.12, highest vs. lowest TSH tertile). 

3. The joint categories of TIR (>70%, 70%) and TSH (tertiles) were used to divide the participants into 6 groups, and the multivariable-adjusted ORs for DR were highest in the TIR 70% and the highest TSH tertile group when compared to the TIR >70% and the lowest TSH tertile group (OR = 1.96, 95% CI 1.41-2.71).

In conclusion, this finding implies that thyroid dysfunction may contribute to the residual risk of DR. For improved DR management in clinical practise, more consideration should be given to the potential effects of both TIR and TSH. To further support the significance of TSH in risk management of diabetic complications and to investigate the reference range for "normal" TSH in the future, well-designed longitudinal studies involving TSH measurements at several time periods are necessary.

Reference: 

Wang, Y., Lu, J., Ni, J., Wang, M., Shen, Y., Lu, W., Zhu, W., Bao, Y., & Zhou, J. (2023). Association of thyroid stimulating hormone and time in range with risk of diabetic retinopathy in euthyroid type 2 diabetes. In Diabetes/Metabolism Research and Reviews. Wiley. https://doi.org/10.1002/dmrr.3639