Table 3. Multivariate analysis of factors affecting treatment success.

CI: confidence interval

	Odds ratio	95% CI	P value
Body mass index (>30 kg/m2 / ≤30 kg/m2)	2.465	1.160-5.240	0.019
Time of diabetes mellitus (>20 yeaars / ≤20 years)	3.082	1.416-6.707	0.005
Smoking status (Yes/No)	2.216	1.037-4.739	0.040
Glomerular filtration rate (≤60 % / >60 %)	2.198	1.022-4.724	0.044