Table 1.

Risk classification system and preventive assessment frequency^{2 10}

Category	Characteristic	Follow-up frequency
0	No peripheral neuropathy	Once in a year
1	Peripheral neuropathy	Once in every 6 months
2	Peripheral neuropathy with peripheral artery disease and/or a foot deformity	Once in every 3–6 months
3	Peripheral neuropathy and history of a foot ulcer or lower-extremity amputation	Once in every 1–3 months