Table 3. Logistic regression analysis evaluating the association between the participants’ clinical characteristics and the presence of diabetic retinopathy in patients with type 1 diabetes.

Variables	Presence of DR	P
Age	1.00 (0.95-1.06)	0.85
Diabetes duration	0.95 (0.89-1.02)	0.20
Systolic blood pressure	0.99 (0.96-1.02)	0.74
GFR	1.01 (1.00-1.03)	0.06

Abbreviation: DR, diabetic retinopathy; GFR, glomerular filtration rate.