| Groups | No. of subjects | Mean age of subjects (years) (SD) | Mean HbA1c (SD) | Mean duration of diabetes (years) (SD) |
| G1 | 65 | 51.2 (5.4) | 8.5 (0.38) | 7.2 (0.33) |
| G2 | 65 | 52 (5) | 9.4 (0.9) | 10.8 (0.36) |
| G3 | 65 | 51.8 (4.3) | 8.1 (1.14) | 9.4 (1.2) |
| G4 | 65 | 57 (4.9) | 9.3 (0.95) | 12 (0.9) |