Association between Normal Thyroid Hormones and Diabetic Retinopathy in Patients with Type 2 Diabetes

Table 2

FT3 levels based on different stages of DR.

Group	Number	FT3 (pmol/L)
Normal	390	4.83 ± 0.50
Mild and moderate NPDR	154	4.69 ± 0.46	0.002^a
Severe NPDR	47	4.27 ± 0.34	<0.001^a
PDR	42	4.40 ± 0.49	<0/001^a

Data are shown as mean ± SD. for difference among groups by analysis of variance (ANOVA) test and LSD t-test for multiple comparisons. ^a:compared with the Normal group. NPDR: nonproliferative diabetic retinopathy; PDR: proliferative diabetic retinopathy.