Table 2.

Inter-Software Reliability Indexes for Left Paraspinal Muscle Measurements at S1^{^a}

↵^a ICC=intraclass correlation coefficient, CI=confidence interval, SEM=standard error of measurement, CSA=cross-sectional area, SI=signal intensity, FCSA=functional CSA, FCSA/CSA=ratio, CSA diff=side-to-side difference in CSA, FCSA diff=side-to-side difference in functional CSA.