Table 3.
Reliability of strain elastography in the supraspinatus tendon using data based on colours, respectively a colour scale and counting the number of lesions from the study phase (n=40)
| Ordinal scale | Intra-rater | Inter-rater | ||
| Total Agreement (%) | LWκ (95% CI) | Total Agreement (%) | LWκ (95% CI.) | |
| Colour scale | ||||
| Medial tendon 1/3 | 80 | 0.76 (0.64 to 0.89) | 80 | 0.77 (0.63 to 0.91) |
| Middle tendon 1/3 | 82.5 | 0.77 (0.65 to 0.88) | 76 | 0.71 (0.58 to 0.83) |
| Lateral tendon 1/3 | 85 | 0.79 (0.65 to 0.94) | 87.5 | 0.81 (0.65 to 0.97) |
| Lesions (no.) | ||||
| Medial tendon 1/3 | 87.5 | 0.82 (0.69 to 0.95) | 82.5 | 0.67 (0.53 to 0.80) |
| Middle tendon 1/3 | 90 | 0.75 (0.51 to 1.00) | 87.5 | 0.63 (0.30 to 0.96) |
| Lateral tendon 1/3 | 87.5 | 0.40 (−0.16 to 0.97) | 90 | 0.24 (−0.14 to 0.62) |
LWκ (95% CI), linear weighted κ with 95% CI.