Characteristic Overall, N = 641 Remissie, N = 201 Persisterende infectie, N = 441 p-value2
Number of ulcers on affected foot 0.038
    1 ulcer 52 (81.2%) 13 (65.0%) 39 (88.6%)
    2 or more ulcers 12 (18.8%) 7 (35.0%) 5 (11.4%)
Aspect of foot affected by index ulcer 0.033
    Plantar 21 (32.8%) 3 (15.0%) 18 (40.9%)
    Medial 17 (26.6%) 3 (15.0%) 14 (31.8%)
    Lateral 12 (18.8%) 6 (30.0%) 6 (13.6%)
    Dorsal 5 (7.8%) 3 (15.0%) 2 (4.5%)
    Interdigital 3 (4.7%) 2 (10.0%) 1 (2.3%)
    Apical 6 (9.4%) 3 (15.0%) 3 (6.8%)
Index ulcer depth grade 1.000
    Grade 2 0 (0.0%) 0 (0.0%) 0 (0.0%)
    Grade 3 7 (10.9%) 2 (10.0%) 5 (11.4%)
    Grade 4 57 (89.1%) 18 (90.0%) 39 (88.6%)
Pre-operative bone biopsy 0.845
    Not performed 45 (70.3%) 14 (70.0%) 31 (70.5%)
    Performed, but no growth 3 (4.7%) 1 (5.0%) 2 (4.5%)
    Monomicrobial growth 6 (9.4%) 1 (5.0%) 5 (11.4%)
    Polymicrobial growth 10 (15.6%) 4 (20.0%) 6 (13.6%)
1 n (%)
2 Fisher's exact test