Table 3 Inter-rater reproducibility of foot measurements
Foot measurement | Rater 1 Mean (SD) | Rater 2 Mean (SD) | ICC (95% CI) [Interpretation] | 95% LOA1 |
|---|---|---|---|---|
Foot length | 193.3 (27.9) | 193.2 (27.6) | 0.99 (0.99 to 1.00) [Excellent] | −2.8 to 2.9 / 0.99 to 1.012 |
Ball of foot length | 146.0 (21.1) | 147.3 (21.0) | 0.97 (0.94 to 1.00) [Excellent] | −10.8 to 8.3 |
Outside ball of foot length | 127.5 (18.4) | 130.5 (15.8) | 0.89 (0.80 to 0.95) [Good] | −18.8 to 12.7 |
Diagonal foot width | 79.4 (13.1) | 78.4 (12.0) | 0.98 (0.96 to 0.99) [Excellent] | −3.8 to 5.8 |
Horizontal foot width | 77.3 (12.7) | 76.8 (12.0) | 0.98 (0.96 to 0.99) [Excellent] | −4.3 to 5.4 |
Heel width | 48.4 (8.5) | 47.1 (8.6) | 0.91 (0.81 to 0.95) [Excellent] | −5.9 to 8.6 / 0.89 to 1.192 |
Wejsflog Index | 2.4 (0.2) | 2.5 (0.2) | 0.90 (0.82 to 0.96) [Good] | −0.2 to 0.2 |
Ball girth | 190.3 (29.1) | 189.4 (29.6) | 0.99 (0.97 to 0.99) [Excellent] | −8.5 to 10.2 |
Instep girth | 202.5 (26.5) | 200.0 (27.5) | 0.98 (0.97 to 0.99) [Excellent] | −7.3 to 12.2 |
First toe height | 20.1 (4.5) | 20.7 (4.1) | 0.92 (0.84 to 0.96) [Excellent] | −3.9 to 2.9 |
Fifth toe height3 | 16.9 (2.6) | 17.5 (2.8) | 0.73 (0.50 to 0.86) [Moderate] | −4.4 to 3.3 |
Instep height | 57.1 (7.7) | 53.6 (7.4) | 0.90 (0.81 to 0.95) [Good] | −3.0 to 9.9 |
Forefoot shape | – | – | 0.77 (0.58 to 0.96)4 [Substantial] | 80 (65 to 95)5 |