Table 1.

Intertester-reliability of measuring length and position variables

Variable	ICC, 1,1	95% CI of ICC	Mean difference (cm)	95%LA (cm)	SEM (cm)
C7-PSIS distance	0.991	0.978 to 0.996	< 0.1	−0.5 to 0.6	0.2
T4	0.967	0.922 to 0.986	<0.1	−0.4 to 0.5	0.2
T7	0.981	0.955 to 0.992	0.1	−0.9 to 1.0	0.3
T10	0.988	0.972 to 0.995	0.1	−0.6 to 0.7	0.2
L1	0.99	0.976 to 0.996	0.1	−0.4 to 0.6	0.2
L4	0.999	0.998 to 1	0.1	−0.4 to 0.6	0.2

Table 1 (ICC = Intraclass Correlation Coefficient, 95% CI = 95% Confidence Interval, 95% LA = 95% Limits of agreement), SEM = Standard error of the measurement, C7-PSIS distance = distance between spinal process of the seventh cervical vertebrae and the posterior superior iliac spine, T4, T7, T10, L1 and L4 = spinal process of the fourth, seventh and tenth thoracic and first and fourth lumbar vertebrae.