Diabetes was diagnosed as per American Diabetes Association (ADA) guidelines, based either on the past medical records or present blood glucose values which showed unequivocal raised fasting blood glucose of more than > 116mg% and post-prandial or post-glucose values of > 200mg%. No case of IGT or IFG was included in the study. Current age was defined as the age at the time of examination (2006 - 2008). Duration of diabetes was taken as the difference between the current date and the date when the fasting or post-prandial blood sugar level met the ADA diabetes diagnostic criteria.