Table 2.
Interobserver agreement between radiologists using magnetic resonance arthrography*
| PABAK | PEA % (n/N) | Proportions of category-specific agreement (n/N) | |||
|---|---|---|---|---|---|
| Dichotomous (present/absent) | Absent | Present | |||
| Rad1 vs. Rad2 | |||||
| Cyst | 0.79 | 90 (61/68) | 94 (106/113) | 70 (16/23) | |
| Delamination | 0.79 | 90 (61/68) | 94 (104/111) | 72 (18/25) | |
| lowT1 | 0.62 | 81 (55/68) | 82 (58/71) | 80 (52/65) | |
| Labrum deformed | 0.62 | 81 (55/68) | 48 (34/71) | 85 (76/89) | |
| Labrum ossifcn. | 0.85 | 93 (62/68) | 96 (118/123) | 55 (6/11) | |
| Fem. bump | 0.79 | 90 (61/68) | 92 (84/91) | 84 (38/45) | |
| Ligamentum teres | 0.94 | 97 (66/68) | 98 (124/126) | 80 (8/10) | |
| Pit | 0.94 | 97 (66/68) | 99 (128/130) | 67 (4/6) | |
| Ordered categories | Normal | Partial | Full-thickness | ||
| Fem. cart loss | 0.93 | 94 (64/68) | 97 (122/126) | 75 (6/8) | 0 (0/2) |
| Acetabular cart loss | 0.82 | 74 (50/68) | 82 (64/78) | 53 (18/34) | 75 (18/24) |
| Labrum finding | 0.73 | 68 (46/68) | 69 (20/29) | 32 (8/25) | 78 (64/82) |
PEA percentage exact agreement
*Quadrant data combined