Table 1

Categories based on recurrence of DUs within a 2-year observation period

No-DUNo DU at any FU visit
EpisodicRarely recurrent: only 1 FU visit with either ≥1 DU or new DU; the remaining FU visits have no DU and no new DU
RecurrentFrequently recurrent: ≥2 FU visits with DU and/or new DU, and ≥1 visit with no DU and no new DU
Chronic≥1 DU and/or new DU at every FU visit
  • DU, digital ulcers; FU, follow-up.