Baseline demographics of patients assessed in reading exercises 1 and 2 by 6 readers (3 rheumatologists, 3 musculoskeletal radiologists).
| Exercise 1, n = 20 | Exercise 2, n = 18 | Exercise 2, n = 27 | |
|---|---|---|---|
| Mean (SD) age, yrs | 64.6 (9.8) | 59.2 (12.2) | 54.6 (10.1) |
| M:F | 9:11 | 11:7 | 12:15 |
| K–L grade | |||
| 0 | 3 | 0 | 22 |
| 1 | 5 | 0 | 5 |
| 2 | 8 | 3 | 0 |
| 3 | 3 | 12 | 0 |
| 4 | 1 | 3 | 0 |
| Mean (SD) BL WOMAC pain score | NA | 287.3 (62.8) | 91.8 (105.9) |
| Mean (SD) BL HIMRISS, femoral BML score, 0–65 | 11.4 (16.3) | 29.46 (18.36) | 2.74 (3.66) |
| Mean (SD) BL HIMRISS, acetabular BML score 0–35 | 6.1 (6.8) | 11.13 (9.85) | 1.15 (1.54) |
| Mean (SD) BL HIMRISS, synovitis-effusion score, 0–30 | 11.9 (9.5) | 12.09 (6.09) | 4.36 (4.31) |
| Mean (SD) BL HIMRISS, total score, 0–130 | 29.4 (25.7) | 52.69 (28.35) | 8.26 (7.78) |
| Mean (SD) BL HOAMS, total BML score, 0–45 | 6.2 (7.0) | 16.13 (11.15) | 1.31 (1.31) |
| Mean (SD) BL HOAMS, synovitis score, 0–8 | 3.2 (2.7) | 4.76 (2.01) | 1.12 (0.93) |
| Cartilage lesions*, mean % (range) | NA | NA | |
| 0 | 39.8 (17.0–59.6) | ||
| 1 | 14.0 (6.0–23.0) | ||
| 2 | 4.8 (0.0–9.0) | ||
| 3 | 20.0 (10.4–26.0) | ||
| 4 | 16.0 (9.0–29.0) | ||
| 5 | 5.4 (1.0–13.0) | ||
| Osteophytes*, mean % (range) | NA | NA | |
| 0 | 35.6 (24.0–43.0) | ||
| 1 | 12.8 (11.0–15.0) | ||
| 2 | 33.2 (26.0–40.0) | ||
| 3 | 15.8 (3.0–30.0) | ||
| 4 | 2.6 (0.0–5.0) | ||
| Osteophytes*, acetabular, mean % (range) | NA | NA | |
| 0 | 63.3 (53.3–73.3) | ||
| 1 | 10.0 (3.3–15.0) | ||
| 2 | 14.7 (3.3–23.3) | ||
| 3 | 11.0 (3.3–16.7) | ||
| 4 | 1.0 (0.0–3.3) | ||
| Labral lesions*, mean % (range) | NA | NA | |
| 0 | 29.9 (11.9–47.4) | ||
| 1 | 25.6 (21.4–31.0) | ||
| 2 | 24.5 (13.8–32.2) | ||
| 3 | 19.9 (5.3–33.9) | ||
| Cysts*, mean % (range) | NA | NA | |
| 0 | 95.6 (79.2–100.0) | ||
| 1 | 3.6 (0.0–15.8) | ||
| 2 | 0.7 (0.0–4.2) | ||
| 3 | 0.2 (0.0–0.8) |
↵* Mean % (range of %) are calculated across locations. K–L grade: Kellgren-Lawrence grade; BL: bone lesion; BML: bone marrow lesion; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; HIMRISS: Hip Inflammation MRI Scoring System; HOAMS: Hip Osteoarthritis MRI Scoring System; MRI: magnetic resonance imaging.