Skip to main content

Table 2 Intra-rater reproducibility of foot measurements

From: Reproducibility of foot dimensions measured from 3-dimensional foot scans in children and adolescents with Down syndrome

  Rater 1 Rater 2
Trial 1 Trial 2    Trial 1 Trial 2   
Foot measurement Mean (SD) Mean (SD) ICC (95% CI) [Interpretation] 95% LOA1 Mean (SD) Mean (SD) ICC (95% CI) [Interpretation] 95% LOA1
Foot length 193.3 (27.9) 192.7 (28.1) 0.99 (0.99 to 1.00) [Excellent] −2.0 to 3.2 193.2 (27.6) 192.5 (28.0) 0.99 (0.99 to 1.00) [Excellent] −1.6 to 3.0
Ball of foot length 146.0 (21.1) 145.6 (22.2) 0.97 (0.94 to 0.99) [Excellent] −9.7 to 10.6 147.3 (21.0) 149.2 (21.9) 0.98 (0.97 to 0.99) [Excellent] −8.7 to 4.8
Outside ball of foot length 127.5 (18.4) 124.9 (17.7) 0.97 (0.94 to 0.99) [Excellent] −5.7 to 10.7 130.5 (15.8) 129.3 (18.0) 0.89 (0.80 to 0.95) [Good] −13.7 to 16.3
Diagonal foot width 79.4 (13.1) 79.0 (13.0) 0.99 (0.98 to 1.00) [Excellent] −3.2 to 3.9 78.4 (12.0) 78.4 (12.3) 0.98 (0.98 to 0.99) [Excellent] −3.8 to 3.7
Horizontal foot width 77.3 (12.7) 77.1 (12.2) 0.97 (0.94 to 0.99) [Excellent] −5.8 to 6.1 / 0.934 to 1.062 76.8 (12.0) 76.9 (11.7) 0.98 (0.98 to 1.00) [Excellent] −3.6 to 3.3
Heel width 48.4 (8.5) 49.4 (7.9) 0.76 (0.60 to 0.90) [Good] −12.1 to 10.1 47.1 (8.6) 45.5 (7.6) 0.83 (0.70 to 0.91) [Good] −7.7 to 10.8 / 0.86 to 1.232
Wejsflog Index 2.5 (0.2) 2.5 (0.2) 0.96 (0.92 to 0.98) [Excellent] −0.1 to 0.1 2.5 (0.21) 2.5 (0.21) 0.95 (0.90 to 0.98) [Excellent] −0.1 to 0.1
Ball girth 190.3 (29.1) 190.6 (31.5) 0.98 (0.96 to 0.99) [Excellent] −11.4 to 10.7 189.4 (29.6) 189.2 (30.7) 0.98 (0.97 to 0.99) [Excellent] −9.8 to 10.3
Instep girth 202.5 (26.5) 204.4 (27.5) 0.97 (0.95 to 0.99) [Excellent] −13.5 to 3.7 200.0 (27.5) 198.7 (26.9) 0.99 (0.98 to 1.00) [Excellent] −5.8 to 8.3
First toe height 20.1 (4.5) 20.7 (3.6) 0.88 (0.80 to 0.94) [Good] −4.3 to 3.3 20.7 (4.1) 21.2 (3.8) 0.83 (0.70 to 0.92) [Good] −4.9 to 3.9
Fifth toe height3 16.93 (2.6) 17.6 (2.7) 0.74 (0.52 to 0.87) [Moderate] −4.3 to 3.0 17.5 (2.8) 17.49 (2.6) 0.84 (0.70 to 0.92) [Good] −2.9 to 2.9
Instep height 57.1 (7.7) 54.4 (8.0) 0.93 (0.90 to 0.97) [Excellent] 2.8 to 8.1 53.6 (7.5) 55.3 (6.7) 0.95 (0.91 to 0.98) [Excellent] −5.7 to 2.5 / 0.89 to 1.052
Forefoot shape – – 0.68 (0.45 to 0.90)4 [Substantial] 73 (60 to 90)5 – – 0.85 (0.70 to 1.0)4 [Almost perfect] 87 (70 to 100)5
  1. 1Limits of agreement. 2Ratio limits of agreement also presented as measurement displays heteroscedasticity. 329 scans were used due to the presence of artefacts. 4Gwet’s AC1. 5Percentage agreement. Foot dimensions are measured in millimetres
Back to article page

Journal of Foot and Ankle Research

ISSN: 1757-1146