Table 2 Reliability of radiographic measurements (ICC = intraclass correlation coefficient, CI = confidence interval, LoA - limits of agreement).
From: Radiographic correlates of hallux valgus severity in older people
Radiographic observations | Relative reliability ICC (95% CI) | Absolute reliability Mean difference (95% LoA) |
|---|---|---|
Hallux abductus angle | 0.95 (0.90 to 0.97) | -0.10 (-6.26 to 6.06) |
Hallux abductus interphalangeal angle | 0.66 (0.44 to 0.80) | -0.98 (-11.26 to 9.32) |
Proximal articular set angle | 0.90 (0.82 to 0.94) | -0.53 (-6.86 to 5.81) |
Intermetatarsal angle | 0.83 (0.70 to 0.90) | -0.05 (-3.43 to 3.33) |
Four grade sesamoid scale | Weighted kappa = 0.86 | NA |
Seven position sesamoid scale | Weighted kappa = 0.90 | NA |
Difference in lengths of first and second metatarsals | 0.89 (0.81 to 0.94) | -0.10 (-2.72 to 2.52) |
Metatarsus adductus angle | 0.91 (0.84 to 0.95) | -0.50 (-4.62 to 3.62) |
Simplified metatarsus adductus angle | 0.88 (0.79 to 0.94) | 0.53 (-5.26 to 6.31) |
Hallux abductus angle (Miller technique) | 0.94 (0.89 to 0.97) | 0.03 (-6.18 to 6.23) |
Distal articular set angle | 0.73 (0.54 to 0.84) | 0.30 (-6.30 to 6.90) |
Congruency of first MPJ | Weighted Kappa = 0.75 | NA |
Shape of the first metatarsal head | Kappa = 0.69 | NA |
First metatarsal declination angle | 0.81 (0.66 to 0.89) | 0.28 (-3.46 to 4.01) |
Lateral intermetatarsal angle | 0.90 (0.83 to 0.95) | 0.03 (-2.30 to 2.35) |
Calcaneal inclination angle | 0.95 (0.92 to 0.97) | 0.10 (-2.80 to 3.00) |
Navicular height | 0.89 (0.79 to 0.94) | -0.35 (-5.26 to 4.56) |
Truncated foot length | 0.99 (0.93 to 0.99) | -0.13 (-2.12 to 1.87) |
Navicular height/truncated foot length | 0.89 (0.80 to 0.94) | 0.00 (-0.03 to 0.03) |