Association between Red Blood Cell Distribution Width and Diabetic Retinopathy: A 5-Year Retrospective Case-Control Study

Table 4

Logistic regression models evaluating the risk factors in DR.

Variable	Against control group			Against DM group
	Odds ratio	95% confidence interval	value	Odds ratio	95% confidence interval	value
SBP (mmHg)	1.951	1.039–1.987	0.004	1.007	0.994–1.020	0.269
DBP (mmHg)	0.902	0.919–0.984	0.673	0.987	0.958–1.018	0.410
RDW (%)	3.791	2.330–6.168	<0.001	1.348	0.997–1.823	0.047
WBC (×10^9)	1.351	1.106–1.651	0.003	1.138	0.968–1.339	0.118
HG (g/L)	0.933	0.912–0.955	<0.001	0.955	0.935–0.975	<0.001
HbA1c (%)				1.228	0.955–1.579	0.019
Diabetes duration (year)				1.178	1.120–1.240	<0.001

Binary logistic regression was used. Odds Ratio: adjusted with age, gender, BMI and hypertension. BMI: body mass index, SBP: systolic blood pressure, DBP: diastolic blood pressure, WBC: white blood cell, HG: hemoglobin, HbA1c: glycated hemoglobin A1c.