RESUMEN
Objective To investigate the relationship between diabetic retinopathy(DR) and the state of diabetes mellitus(DM) control.Methods The factors for the occurrence and development of DR were analyzed by non conditional Logistic regression model.Results 5 significant factors were screened out,which were urinary microalbumin excretion index(ALB/Cr),blood glucose before breakfast,glycosylated hemoglobin(HbAlc),diabetic neuropathy and course of DM.And the sugestible threshold value of blood glucose before breakfast is 7.90mmol/L at which we can prevent the occurrence of DR,and at 7.15mmol/L,occurrence of DR can be strictly controlled.Conclusion The state of controlling blood glucose and other complications in DM patients influences the occurrence and development of DR.