Table 3 Characteristics of foot ulcers and amputations

Foot ulcers, total no. (%)

211 (100)

103 (49)

108 (51)

Amputations, total no. (%)

20 (100)

11 (55)

9 (45)

 New, total no. (%)

200 (95)

97 (95)

103 (95)

 Minor, total no. (%)^a

18 (90)

11 (100)

7 (78)

 Reoccurring, total no. (%)

11 (5)

6 (6)

5 (2)

 Major, total no. (%)^a

2 (10)

0 (0)

2 (22)

Amputations per participant

 Mean (SD), range

2.6 (2.0), 1 to 11

2.0 (1.2), 1 to 5

1.9 (1.2), 1 to 6

 Mean (SD), range

1.7 (0.8), 1 to 3

0.9 (0.9), 0 to 3

0.8 (1.1), 0 to 3

 Median (IQR)

2 (1 to 4)

2 (1 to 3)

1 (1 to 2)

 Median (IQR)

1.5 (1 to 2)

1.0 (0 to 1)

0 (0 to 1.3)

Location^b

Location

 Toes (dorsal, lateral or medial), total no. (%)

124 (59)

65 (63)

59 (55)

 Single toe, total no. (%)

10 (50)

7 (64)

3 (33)

 Plantar toes, forefoot, midfoot, total no. (%)

41 (19)

18 (18)

23 (21)

 Multiple toes, total no. (%)

4 (20)

2 (18)

2 (22)

 Dorsal foot, total no. (%)

14 (7)

7 (7)

7 (7)

 Partial toe, total no. (%)

1 (5)

1 (9)

0 (0)

 Heel, total no. (%)

32 (15)

13 (13)

19 (18)

 Metatarsal + single toe, total no. (%)

1 (5)

0 (0)

1 (11)

 Transmetatarsal, total no. (%)

2 (10)

1 (9)

1 (11)

 Below knee amputation, total no. (%)

2 (10)

0 (0)

2 (22)

Reason for amputation

 Neuropathic, total no. (%)

23 (11)

16 (16)

7 (7)

 Infected foot ulcer, total no. (%)

8 (40)

4 (36)

4 (44)

 Neuro-ischemic, total no. (%)

129 (61)

61 (59)

68 (63)

 PAD/gangrene, total no. (%)

9 (45)

5 (46)

4 (44)

 Ischemic, total no. (%)

10 (5)

5 (5)

5 (5)

 Osteomyelitis, total no. (%)

3 (15)

2 (18)

1 (11)

 Pressure injury, total no. (%)

32 (15)

13 (13)

19 (18)

 Other/unknown, total no. (%)

17 (8)

8 (8)

9 (8)

Time to first foot ulcer, mean (SD), days

164 (127)

178 (124)

182 (125)

Time to first amputation, mean (SD), days

202 (104)

253 (90)

130 (79)