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Table 1 Participant characteristics

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)
MD (95% CI)
or
OR (95% CI)
P-value*
Mean age (SD), years 57.9 (12.6) 56.3 (13.7) 59.1 (12.0) 2.81 (−7.40 to 13.02) 0.576
Male sex, n (%) 18 (66.7) 8 (66.7) 10 (66.7) 1.00 (0.20 to 5.00) >  0.99
Known ethanol abuse, n (%) 6 (22.2) 4 (33.3) 2 (13.3) 0.31 (0.05 to 2.08) 0.357
Smoking history, n (%)a 8 (29.6) 2 (16.7) 6 (40.0) 3.33 (0.53 to 20.91) 0.236
Diabetes, n (%) 24 (88.9) 10 (83.3) 14 (93.3) 2.80 (0.22 to 35.29) 0.569
 Type 1, n (%) 8 (33.3) 4 (40.0) 4 (28.6) 0.60 (0.11 to 3.34) 0.673
 Type 2, n (%) 16 (66.7) 6 (60.0) 10 (71.4) 1.67 (0.30 to 9.27) 0.673
 Mean duration (SD), years 24.0 (13.3) 22.4 (13.5) 25.1 (13.6) 2.74 (−8.87 to 14.36) 0.629
 Mean HbA1c (SD), %b 8.6 (2.0) 8.1 (2.5) 8.9 (1.7) 0.82 (−0.99 to 2.63) 0.358
Dyslipidaemia, n (%) 16 (59.3) 6 (50.0) 10 (66.7) 2.00 (0.42 to 9.52) 0.452
Hypertension, n (%) 13 (48.1) 4 (33.3) 9 (60.0) 3.00 (0.62 to 14.62) 0.168
Ischaemic heart disease, n (%) 3 (11.1) 1 (8.3) 2 (13.3) 1.69 (0.14 to 21.27) >  0.99
Congestive cardiac failure, n (%) 0 (0) 0 (0) 0 (0) N/A N/A
Cerebrovascular disease, n (%) 2 (7.4) 0 (0) 2 (13.3) 1.92 (1.32 to 2.80) 0.487
Chronic kidney disease, n (%) 4 (14.8) 1 (8.3) 3 (20.0) 2.75 (0.25 to 30.51) 0.605
Osteoarthritis, n (%) 13 (48.1) 3 (25.0) 10 (66.7) 6.00 (1.11 to 32.55) 0.031*
Previous foot ulceration, n (%) 18 (66.7) 7 (58.3) 11 (73.3) 1.96 (0.39 to 9.93) 0.448
Previous foot infection, n (%) 17 (63.0) 7 (58.3) 10 (66.7) 1.43 (0.30 to 6.88) 0.706
Previous amputation, n (%) 4 (14.8) 3 (25.0) 1 (6.7) 0.21 (0.02 to 2.39) 0.294
  1. Data are n (%), MD (95% CI) or OR (95% CI), unless otherwise specified. Percentages may not add up to 100%, as they are rounded to the nearest percent
  2. CI, confidence interval; HbA1c, glycated haemoglobin; MD, mean difference; N/A, not applicable; OR, odds ratio; SD, standard deviation; TCC, total contact casting
  3. SI conversion factor: To convert HbA1c to proportion of total haemoglobin, multiply by 0.01
  4. *Significant difference between ‘< 4 months’ and ‘> 4 months’ median TCC duration groups, p < 0.05
  5. aPast or current smoker
  6. bMaximum missing data were for glycated haemoglobin (HbA1c) involving 1 participant overall (3.7%)
  7. Data are MD (95% CI), unless otherwise specified