Table 2

Reliability statistics according to figure 1B (all) and E (individual ISAK sites)

	Triceps	Subscapular	Biceps	Iliac crest	Supraspinale	Abdominal	Front thigh	Medial calf	All
Slope	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
SD_slope	0.02	0.04	0.06	0.02	0.02	0.02	0.02	0.03	0.01
p_slope	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
95% confidence lower limit	0.53	0.92	0.89	0.97	0.96	0.95	0.96	0.95	0.99
95% confidence higher limit	1.05	1.08	1.11	1.03	1.04	1.05	1.04	1.05	1.01
Intercept	<10⁻⁶	<10⁻⁶	<10⁻⁶	<10⁻⁶	<10⁻⁶	<10⁻⁶	<10⁻⁶	<10⁻⁶	<10⁻⁶
SD_intercept	0.26	0.20	0.29	0.19	0.14	0.23	0.21	0.19	0.06
p_intercept	ns	ns	ns	ns	ns	ns	ns	ns	ns
95% confidence lower limit	−0.52	−0.41	−0.59	−0.39	−0.29	−0.47	−0.42	−0.37	−0.13
95% confidence higher limit	0.52	0.41	0.59	0.39	0.29	0.47	0.42	0.37	0.13
R²	0.97	0.94	0.87	0.99	0.98	0.98	0.98	0.97	0.98
SEE	0.65	0.58	0.79	0.57	0.42	0.66	0.59	0.57	0.60
LOA	1.26	1.12	1.54	1.11	0.82	1.26	1.14	1.11	1.18
ICC	0.966	0.917	0.811	0.982	0.960	0.985	0.972	0.953	0.968
95% confidence lower limit	0.925	0.795	0.632	0.952	0.900	0.957	0.938	0.903	0.957
95% confidence higher limit	0.986	0.974	0.920	0.995	0.987	0.996	0.989	0.980	0.977

Regression analysis: slope, intercept and corresponding SDs, significances (p values; ns, not significant, that is, the intercepts do not significantly deviate from 0), and 95% CIs (conf_low, conf_high) as well as Pearson's regression coefficient squared (R²) and SE of estimate (SEE) are given. Slope of 1.00 results when US distances are calculated with 1510 m/s sound speed. Bland-Altmann test: limit of agreement (LOA). Reliability: intraclass correlation coefficient (ICC; 2-way random model, single scores).