Table 2. Logistic regression model with the dependent variable as abnormal ABI, abnormal TBI, abnormal duplex, and critical limb ischemia respectively.

	Independent variables	OR	CI	P
ABI	Age (per 10 years)	1.89	1.09–3.27	0.023
	duration of diabetes (per 10 years)	1.60	1.10–2.34	0.014
	Hypertension (yes/no)	3.77	1.27–11.19	0.017
	SBP ≥130 mmHg	1.82	0.65–5.09	0.254
	PDR (yes/no)	3.61	1.15–11.26	0.027
TBI	Age (per 10 years)	1.31	0.88–1.97	0.189
	duration of diabetes (per 10 years)	1.10	0.82–1.48	0.517
	Hypertension (yes/no)	2.03	0.97–4.24	0.060
	SBP ≥130 mmHg	2.33	1.10–4.92	0.027
	PDR (yes/no)	2.84	1.19–6.74	0.018
Duplex	Age (per 10 years)	1.89	1.02–3.48	0.042
	duration of diabetes (per 10 years)	1.41	0.96–2.07	0.076
	Hypertension (yes/no)	2.06	0.66–6.45	0.212
	SBP ≥130 mmHg	1.10	0.37–3.23	0.865
	PDR (yes/no)	3.28	1.00–10.71	0.049
Critical limb ischemia	Age (per 10 years)	1.56	1.00–2.44	0.051
	duration of diabetes (per 10 years)	1.24	0.90–1.69	0.185
	Hypertension (yes/no)	1.53	0.68–3.46	0.309
	SBP ≥130 mmHg	1.18	0.51–2.72	0.695
	PDR (yes/no)	5.52	2.14–14.26	<0.001

It was adjusted for the variables shown above as well as duration of diabetes, BMI, UAER, smoking, HbA1c, total cholesterol and triglycerides.