Reliability of scoring bone marrow lesion (BML) by region and synovitis in Hip Osteoarthritis MRI Scoring System (HOAMS; mean weighted kappa and % agreement) for reader pairs (n = 15) in reading exercises 1 (n = 20) and 2 (n = 45).
| Exercise 1 | Exercise 2 | |||
|---|---|---|---|---|
| Region | Mean K (min–max) | % Agreement (min–max) | Mean Weighted K (min–max) | % Agreement (min–max) |
| AIF | 0.24 (0.00–0.46) | 59.0 (20–85) | 0.37 (0.16–0.62) | 66.8 (50.8–83.1) |
| ASA | 0.35 (0.16–0.61) | 47.0 (30–70) | 0.26 (0.00–0.63) | 62.7 (45.9–81.4) |
| ASF | 0.46 (0.19–0.76) | 71.7 (65–80) | 0.42 (0.28–0.73) | 63.3 (49.2–83.1) |
| CCA | 0.17 (−0.00–0.47) | 73.7 (50–95) | 0.65 (0.52–0.77) | 69.0 (56.4–77.8) |
| CCF | 0.36 (0.08–0.67) | 59.0 (35–85) | 0.73 (0.58–0.83) | 69.5 (55.6–81.0) |
| CIA | 0.06 (−0.08–0.38) | 81.7 (60–100) | 0.44 (0.20–0.69) | 77.1 (71.0–84.1) |
| CIF | 0.22 (−0.10–0.79) | 69.0 (40–95) | 0.69 (0.58–0.86) | 68.6 (58.8–84.1) |
| CLF | 0.48 (0.22–0.80) | 68.3 (45–80) | 0.72 (0.61–0.78) | 70.8 (58.7–76.2) |
| CMF | 0.24 (0.03–0.78) | 66.3 (40–95) | 0.65 (0.52–0.83) | 73.0 (61.9–85.7) |
| CSA | 0.55 (0.34–0.82) | 61.7 (45–85) | 0.69 (0.60–0.78) | 67.4 (58.1–76.2) |
| CSF | 0.71 (0.58–0.86) | 79.3 (65–90) | 0.72 (0.58–0.78) | 67.3 (57.1–74.6) |
| PIA | 0.05 (−0.08–0.46) | 89.7 (80–100) | 0.22 (−0.05–0.31) | 81.3 (77.1–86.2) |
| PIF | 0.21 (−0.11–0.52) | 65.3 (30–90) | 0.36 (0.19–0.59) | 63.1 (50.0–84.8) |
| PSA | 0.16 (−0.07–0.52) | 70.7 (50–95) | 0.19 (−0.03–0.46) | 64.1 (44.3–79.7) |
| PSF | 0.27 (−0.14–0.77) | 71.3 (60–95) | 0.37 (0.23–0.50) | 64.7 (56.5–69.5) |
| Synovitis | ||||
| AS | 0.27 (0.05–0.56) | 50.3 (35.0–68.4) | 0.39 (0.23–0.69) | 52.3 (41.7–73.0) |
| LS | 0.28 (0.12–0.53) | 45.2 (35.0–61.1) | 0.30 (0.16–0.54) | 47.1 (33.3–67.7) |
| MS | 0.19 (0.10–0.43) | 39.2 (27.8–66.7) | 0.34 (0.08–0.64) | 41.1 (21.0–73.0) |
| PS | 0.31 (0.05–0.62) | 49.8 (35.0–73.7) | 0.35 (0.20–0.48) | 49.9 (32.4–61.1) |
AIF: anterior-inferior femoral; ASA: anterior-superior acetabulum; ASF: anterior-superior femoral; CCA: central-central acetabulum; CCF: central-central femoral; CIA: central-inferior acetabulum; CIF: central-inferior femoral; CLF: central-lateral femoral; CMF: central-medial femoral; CSA: central-superior acetabulum; CSF: central-superior femoral; PIA: posterior-inferior acetabulum; PIF: posterior-inferior femoral; PSA: posterior-superior acetabulum; PSF: posterior-superior femoral; AS: anterior synovitis; LS: lateral synovitis; MS: medial synovitis; PS: posterior synovitis; MRI: magnetic resonance imaging.