Early Onset Age Increased the Risk of Diabetic Retinopathy in Type 2 Diabetes Patients with Duration of 10–20 Years and HbA1C ≥7%: A Hospital-Based Case-Control Study

Table 2

Odds ratios of DR and PDR by onset age of T2D and category of diabetic duration or HbA1c.

	DR		PDR
	Early onset	Elderly onset	Early onset	Elderly onset
Diabetes duration
<15 years	2.819 (1.446–5.495)	1 (ref)	3.039 (1.140–8.102)	1 (ref)
≥15 years	5.202 (2.625–10.310)	1.934 (0.666–5.619)	4.376 (1.642–11.666)	4.240 (1.135–15.840)
HbA1c (%)
7–9%	1.914 (0.910–4.026)	1 (ref)	1.797 (0.702–4.598)	1 (ref)
≥9%	3.889 (1.852–8.167)	0.805 (0.300–2.159)	2.065 (0.815–5.232)	0.833 (0.232–2.993)

DR, diabetic retinopathy; PDR, proliferative diabetic retinopathy; T2D, type 2 diabetes; HbA1c, glycated hemoglobin.