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Table 3 Charcot foot history

From: Duration of total contact casting for resolution of acute Charcot foot: a retrospective cohort study

  Median TCC duration  
Variable Total
(N = 27)
<  4 months
(n = 12)
>  4 months
(n = 15)
OR (95% CI) P-value*
Charcot foot
 Left, n (%) 14 (51.9) 4 (33.3) 10 (66.7) 4.00 (0.80 to 20.02) 0.085
 Right, n (%) 13 (48.1) 8 (66.7) 5 (33.3) 0.25 (0.05 to 1.25) 0.085
Stage of Charcot
 Stage 0, n (%) 0 (0) 0 (0) 0 (0) N/A N/A
 Stage 1, n (%) 27 (100.0) 12 (100.0) 15 (100.0) N/A N/A
Median Charcot duration (IQR), monthsa,b 2.0 (1.0 to 6.0) 2.5 (1.0 to 6.0) 1.8 (0.9 to 6.8) N/A 0.709
Charcot trigger
 Ulceration, n (%) 9 (33.3) 5 (41.7) 4 (26.7) 0.51 (0.10 to 2.57) 0.448
 Injury/trauma, n (%) 14 (51.9) 5 (41.7) 9 (60.0) 2.10 (0.45 to 9.84) 0.343
 Amputation, n (%) 2 (7.4) 2 (16.7) 0 (0) 1.20 (0.93 to 1.55) 0.188
 Lymphoedema, n (%) 1 (3.7) 0 (0) 1 (6.7) 0.93 (0.82 to 1.07) >  0.99
 Unknown, n (%) 1 (3.7) 0 (0) 1 (6.7) 0.93 (0.82 to 1.07) >  0.99
Charcot misdiagnosis, n (%) 17 (63.0) 7 (58.3) 10 (66.7) 1.43 (0.30 to 6.88) 0.706
Charcot pattern
 Tarsometatarsal joints, n (%) 12 (44.4) 5 (41.7) 7 (46.7) 1.23 (0.27 to 5.67) 0.795
 NC, TN, CC joints, n (%) 11 (40.7) 6 (50.0) 5 (33.3) 0.50 (0.11 to 2.38) 0.452
 Ankle and subtalar joints, n (%) 1 (3.7) 0 (0) 1 (6.7) 0.93 (0.82 to 1.07) >  0.99
 Combination, n (%)c 3 (11.1) 1 (8.3) 2 (13.3) 1.69 (0.14 to 21.3) >  0.99
Imaging received
 X-ray, n (%) 27 (100.0) 12 (100.0) 15 (100.0) N/A N/A
 Bone scan, n (%) 4 (14.8) 0 (0) 4 (26.7) 0.73 (0.54 to 1.00) 0.106
 MRI, n (%) 4 (14.8) 2 (16.7) 2 (13.3) 0.77 (0.09 to 6.45) >  0.99
  1. Data are n (%) or OR (95% CI), unless otherwise specified. Percentages may not add up to 100%, as they are rounded to the nearest percent
  2. CC, calcaneocuboid; CI, confidence interval; IQR, interquartile range; MRI, magnetic resonance imaging; N/A, not applicable; NC, naviculocuneiform; OR, odds ratio; SD, standard deviation; TCC, total contact casting; TN, talonavicular
  3. *Significant difference between ‘< 4 months’ and ‘> 4 months’ median TCC duration groups, p < 0.05
  4. aApproximate duration of signs and symptoms consistent with acute Charcot foot prior to attending the high-risk foot service. This information was obtained via patient report within the clinic
  5. bMaximum missing data were for Charcot duration involving 3 participants overall (11.1%)
  6. cTwo participants (7.4%) had a combination Charcot pattern involving the tarsometatarsal joints and the NC, TN and CC joints. One participant (3.7) had a combination Charcot pattern involving the calcaneus and the forefoot
  7. P-value relates to Mann-Whitney U test