Comparison of the mean HbA1c level before and after 3 - month treatment HbA1c Group Before treatment (M ± SD) After 3 - month treatment (M ± SD) HbA1c (M ± SD) p SRP+DL 8.17 ± 1.19 7.56 ± 1.27 0.61 ± 0.82 <0.001 SRP 8.19 ± 1.57 7.94 ± 1.41 0.25 ± 0.82 0.04 p 0.058 Remarks: The mean HbA1c level in both groups decreased significantly after 3-month treatment, (p<0.05).