Table 2 Inter- and Intra-observer reproducibility in each muscle type. Inter- and Intra-reader reproducibility was assessed by calculating weighted Cohen’s Kappa and using cluster-resampled bootstrapping with 1000 repetitions to derive a 95% CI while accounting for clustered observations (two thighs per person).
Muscle | Kappa | Bootstrap standard error | Bootstrap 95% confidence interval |
|---|---|---|---|
Inter-observer reproducibility | |||
Vastus Medialis | 0.82 | 0.06 | 0.70–0.93 |
Vastus Lateralis | 0.73 | 0.06 | 0.61–0.86 |
Vastus Intermedius | 0.80 | 0.06 | 0.68–0.92 |
Rectus Femoris | 0.67 | 0.07 | 0.54–0.80 |
Semimembranosus | 0.68 | 0.05 | 0.58–0.78 |
Semitendinosus | 0.70 | 0.06 | 0.57–0.83 |
Biceps Femoris | 0.86 | 0.04 | 0.78–0.95 |
Intra-observer reproducibility | |||
Vastus Medialis | 0.88 | 0.03 | 0.82–0.95 |
Vastus Lateralis | 0.88 | 0.03 | 0.82–0.94 |
Vastus Intermedius | 0.91 | 0.03 | 0.85–0.96 |
Rectus Femoris | 0.89 | 0.02 | 0.83–0.95 |
Semimembranosus | 0.86 | 0.02 | 0.81–0.92 |
Semitendinosus | 0.92 | 0.02 | 0.88–0.97 |
Biceps Femoris | 0.85 | 0.03 | 0.79–0.91 |
