Table 2.
Test–retest analysis of features used in evaluation of growth changes on MRI in 60 children with juvenile idiopathic arthritis and hip involvement (right hip)
| Markers for assessment of growth | OBS 1 | Intraobserver (OBS1) (1st vs. 2nd measurement) |
OBS 2 | Interobserver (OBS 1 vs. OBS 2) |
|||
|---|---|---|---|---|---|---|---|
| 1st mean (SD) | 2nd mean (SD) | Mean diff. (SD) | 95% LOA | Mean (SD) | Mean diff. (SD) | 95% LOA | |
| Femoral neck width, mm | 29.0 (14.9) | 25.0 (4.2) | 4.4 (14.6) | –24.8 to 33.6 | 28.2 (8.4) | 3.8 (7.5) | –11.2 to 18.8 |
| Femoral head/neck length, mm | 72.3 (19.6) | 76.3 (13.6) | 3.1 (14.4) | –25.7 to 31.9 | 26.4 (5.4) | 3.8 (7.5) | –11.2 to 18.8 |
| CCD angle, degrees | 132.0 (7.5) | 131.1 (8.6) | 0.5 (6.8) | –13.1 to 14.1 | 132.9 (5.5) | 1.5 (8.3) | –15.1 to 18.1 |
| TFHD, mm | 18.4 (5.8) | 18.3 (5.9) | 0.1 (2.8) | –5.5 to 5.7 | 22.6 (11.0) | 0.1 (2.8) | –3.5 to 5.7 |
| Joint space width, mm | 2.8 (1.3) | 3.0 (1.5) | 0.2 (0.9) | –1.6 to 2.0 | 3.3 (1.3) | 0.3 (1.5) | – 2.7 to 3.3 |
CCD caput–collum–diaphyseal angle, diff. difference, LOA limits of agreement, OBS observer, SD standard deviation, TFHD trochanteric–femoral head distance