Likewise, there was no correlation between the infecting pathogen in diabetic foot ulcer with the patient's history of smoking, previous history of diabetic ulcer, type of medication for diabetes (oral or insulin), duration of the ulcer, duration of diabetic disease, or history of amputation (P value = 0.750, 0.268, 0.355, 0.464, 0.253, and 0.509). Here, INS is linked to diabetes mellitus.