Table 3.
(Left portion) Comparison of the digitation of muscle contours from US between a trained and a novice rater. Presented are the absolute levels of agreement derived from Bland Altman analyses (with lower and upper limits of agreement) and Pearson’s correlation coefficients (r) (with 95% confidence intervals) of MRI and US measurements for hamstring muscles CSA at different portions of femur length. (Right portion) Absolute level of agreement and Pearson’s correlation coefficients (r) (with 95% confidence intervals) between MRI and US measurements for the trained rater after the analysis of MRI scans.
| Rater 1 (trained) vs. Rater 2 (novice) (US) (MRI CSAs assessed in randomized order by rater 1 post US assessment n1) |
Rater 1 (trained) assessment n2 (US) (US CSAs re-assessed in randomized order post MRI assessment) |
|||||
|---|---|---|---|---|---|---|
| Muscle (distal—0%, to proximal—100%) | Rater 1 Mean bias (LLOA –ULOA) (cm2) |
Rater 1 Pearson’s r (95% CI) (US vs. MRI) |
Rater 2 Mean bias (LLOA –ULOA) (cm2) |
Rater 2 Pearson’s r (95% CI) (US vs. MRI) |
Rater 1 US CSA—n2 Mean bias (LLOA –ULOA) (cm2) |
Rater 1 Pearson’s r (95% CI) (US-2 vs. MRI) |
| Semimembranosus | ||||||
| 30% (n = 45) | − 0.17 (− 2.54 to 2.20) | 0.90 (0.83 to 0.94) | − 0.59 (− 4.36 to 3.18) | 0.76 (0.59 to 0.86) | 0.09 (− 1.54 to 1.73) | 0.95 (0.92 to 0.97) |
| 40% (n = 45) |
− 0.53 (− 3.02 to 1.94) |
0.85 (0.75 to 0.92) | − 0.74 (− 3.51 to 2.01) | 0.85 (0.73 to 0.91) | − 0.53 (− 1.80 to 1.23) | 0.94 (0.90 to 0.97) |
| 50% (n = 45) | − 1.01 (− 3.70 to 1.78) | 0.81 (0.69 to 0.89) | − 0.96 (− 4.97 to 3.03) | 0.69 (0.49 to 0.81) | − 0.59 (− 2.66 to 1.58) | 0.86 (0.75 to 0.92) |
| 60% (n = 40)a | − 1.04 (− 3.51 to 1.41) | 0.42 (0.13 to 0.65) | − 1.16 (− 4.36 to 2.02) | 0.23 (− 0.01 to 0.50) | − 1.12 (− 3.71 to 1.46) | 0.41 (0.11 to 0.64) |
| Semitendinosus | ||||||
| 30% (n = 45) | 0.19 (− 1.73 to 2.12) | 0.84 (0.73 to 0.91) | 0.68 (− 1.37 to 2.75) | 0.83 (0.70 to 0.90) | 0.38 (− 1.06 to 1.83) | 0.91 (0.85 to 0.95) |
| 40% (n = 45) | 0.39 (− 1.90 to 2.69) | 0.84 (0.72 to 0.91) | 0.61 (− 1.52 to 2.74) | 0.87 (0.78 to 0.93) | 0.51 (− 1.25 to 2.29) | 0.90 (0.83 to 0.94) |
| 50% (n = 45) | 0.24 (− 1.54 to 2.06) | 0.92 (0.87 to 0.95) | 0.55 (− 1.87 to 2.98) | 0.88 (0.79 to 0.93) | 0.29 (− 1.01 to 1.58) | 0.95 (0.92 to 0.97) |
| 60% (n = 45) | − 0.19 (− 2.07 to 1.67) | 0.90 (0.83 to 0.94) | − 0.22 (− 3.06 to 2.61) | 0.77 (0.62 to 0.87) | − 0.23 (− 1.84 to 1.36) | 0.93 (0.87 to 0.96) |
| Biceps femoris long head | ||||||
| 30% (n = 45) | 1.21 (− 0.73 to 3.16) | 0.89 (0.81 to 0.94) | 0.84 (− 1.92 to 3.60) | 0.82 (0.68 to 0.89) | 1.09 (− 0.94 to 3.14) | 0.88 (0.80 to 0.93) |
| 40% (n = 45) | 0.75 (− 1.42 to 2.93) | 0.89 (0.81 to 0.94) | 0.24 (− 2.12 to 2.60) | 0.87 (0.77 to 0.92) | 0.89 (− 0.87 to 2.66) | 0.92 (0.87 to 0.96) |
| 50% (n = 45) | − 0.22 (− 2.19 to 1.74) | 0.88 (0.78 to 0.93) | − 1.11 (− 3.54 to 1.31) | 0.84 (0.72 to 0.91) | − 0.07 (− 1.50 to 1.35) | 0.93 (0.88 to 0.96) |
| 60% (n = 45) | − 0.69 (− 3.19 to 1.79) | 0.76 (0.60 to 0.86) | − 1.77 (− 4.68 to 1.13) | 0.72 (0.53 to 0.83) | − 0.79 (− 2.97 to 1.38) | 0.82 (0.70 to 0.90) |
| Biceps femoris short head | ||||||
| 30% (n = 45) | 0.02 (− 1.89 to 1.93) | 0.79 (0.65 to 0.88) | − 0.15 (− 2.32 to 2.01) | 0.78 (0.63 to 0.87) | − 0.27 (− 1.42 to 0.86) | 0.91 (0.85 to 0.95) |
| 40% (n = 45) | − 0.08 (− 1.51 to 1.33) | 0.74 (0.57 to 0.84) | − 0.04 (− 1.87 to 1.78) | 0.64 (0.42 to 0.78) | − 0.02 (− 1.44 to 1.39) | 0.78 (0.64 to 0.87) |
| 50% (n = 36)a | − 0.65 (− 1.98 to 0.67) | 0.50 (0.21 to 0.71) | − 0.68 (− 3.1 to 1.73) | − 0.001 (− 0.03 to 0.32) | − 0.25 (− 1.28 to 0.77) | 0.82 (0.67 to 0.90) |
| 60% (n = 0)a | – | – | – | – | – | |
aLower number of subjects due to not visible muscle.