Table 7.

Variables included in the proposed model. Diabetes Mellitus sujets.

	B	E.T.	Wald	gl	p	Exp(B)
Duration of the disease: 1–5 years			6.618	2	0.037
Duration of the disease: 5–10 years	0.275	0.358	0.590	1	0.443	1.316
Duration of the disease: More than 10 years	0.974	0.381	6.546	1	0.011	2.649
Constant	0.318	0.232	1.879	1	0.170	1.375

B: regression coefficient; E.T.: standard error; gl: degrees of freedom; p: p-value; Exp(B): exponential of the regression coefficient.