Table 1 Inter-method reliability indexes between the manual thresholding technique and automated thresholding algorithm for the right and left multifidus and erector spinae muscles at L4–L5 and L5–S1
Parameter | Right side | Left side | ||||
|---|---|---|---|---|---|---|
Mean (SD) | ICC (95% CI) | SEM | Mean (SD) | ICC (95% CI) | SEM | |
Multifidus L4–L5 | ||||||
CSA (cm2) | 9.77 (1.83) | 0.99 (0.98–1.00) | 0.18 | 9.39 (1.44) | 0.98 (0.97–0.99) | 0.20 |
FCSA (cm2) | 4.39 (1.58) | 0.84 (0.68–0.92) | 0.63 | 4.44 (1.55) | 0.90 (0.76–0.95) | 0.49 |
Fat CSA (cm2) | 5.38 (1.38) | 0.83 (0.65–0.92) | 0.57 | 4.95 (1.10) | 0.80 (0.51–0.91) | 0.49 |
Fat % | 0.56 (0.12) | 0.79 (0.57–0.90) | 0.05 | 0.53 (0.12) | 0.83 (0.55–0.92) | 0.05 |
Erector spinae L4–L5 | ||||||
CSA (cm2) | 16.36 (3.39) | 0.98 (0.96–0.99) | 0.48 | 17.35 (3.88) | 0.99 (0.95–0.99) | 0.39 |
FCSA (cm2) | 7.25 (2.47) | 0.96 (0.91–0.98) | 0.49 | 9.64 (2.32) | 0.94 (0.88–0.97) | 0.57 |
Fat CSA (cm2) | 9.11 (2.28) | 0.94 (0.84–0.97) | 0.56 | 9.64 (2.33) | 0.91 (0.78–0.96) | 0.70 |
Fat % | 0.56 (0.10) | 0.91 (0.81–0.95) | 0.03 | 0.56 (0.10) | 0.85 (0.70–0.93) | 0.04 |
Multifidus L5–S1 | ||||||
CSA (cm2) | 11.25 (1.75) | 0.97 (0.90–0.97) | 0.30 | 11.29 (1.53) | 0.98 (0.96–0.99) | 0.22 |
FCSA (cm2) | 5.34 (1.94) | 0.93 (0.86–0.96) | 0.51 | 5.49 (1.65) | 0.90 (0.80–0.95) | 0.52 |
Fat CSA (cm2) | 5.91 (1.27) | 0.86 (0.72–0.93) | 0.48 | 5.80 (1.21) | 0.78 (0.54–0.89) | 0.57 |
Fat % | 0.53 (0.13) | 0.90 (0.80–0.95) | 0.04 | 0.52 (0.11) | 0.82 (0.62–0.91) | 0.05 |
Erector spine L5–S1 | ||||||
CSA (cm2) | 11.26 (4.06) | 0.97 (0.90–0.99) | 0.70 | 11.43 (4.4) | 0.95 (0.87–0.97) | 0.98 |
FCSA (cm2) | 3.77 (2.22) | 0.91 (0.71–0.96) | 0.67 | 3.88 (2.27) | 0.94 (0.88–0.97) | 0.62 |
Fat CSA (cm2) | 7.49 (2.37) | 0.97 (0.94–0.98) | 0.41 | 7.55 (2.53) | 0.91 (0.83–0.96) | 0.68 |
Fat % | 0.68 (0.11) | 0.81 (0.48–0.92) | 0.04 | 0.68 (0.10) | 0.78 (0.50–0.90) | 0.05 |