Intra-rater and inter-rater reliability of the process of obtaining cross-sectional area and echo intensity measurements of muscles from ultrasound images

Figures & Tables

	Scale		Depth		Rectus femoris				Vastus lateralis
Variable	(pixels/cm)		(cm)		CSA (cm²)		El (AU)		CSA (cm²)		El (AU)
RATER	1	2	1	2	1	2	1	2	1	2	1	2
Average	41.5	41.4	0.82	0.77	6.29	6.21	10.04	10.02	21.78	21.66	12.04	11.91
CV%	2.51	1.89	10.97	10.12	11.66	6.72	6.11	9.93	6.01	5.54	6.95	5.61
P value	0.45	0.42	0.86	0.52	0.47	0.25	0.40	0.36	0.13	0.07	0.32	0.22
ICC _3,1	0.85	0.88	0.96	0.98	0.74	0.67	0.36	0.32	0.85	0.88	0.55	0.47
SEM	1.69	1.60	0.05	0.04	0.68	0.77	1.00	1.05	1.44	1.38	0.71	0.72
SEM (%)	4.07	3.86	6.10	5.19	10.81	12.40	9.96	10.48	6.61	6.37	5.90	6.05
MD	4.68	4.43	0.14	0.11	1.88	2.15	2.79	2.92	4.00	3.83	1.97	2.00

	Scale	Depth	Rectus Femoris		Vastus Lateralis
Variable	(pixels/cm)	(cm)	CSA (cm²)	El (AU)	CSA (cm²)	El (AU)
Average	41.54	0.79	6.30	10.00	21.72	11.98
cv %	2.01	7.59	7.82	3.91	3.36	2.95
P value	0.68	0.4	0.12	0.21	0.98	0.45
ICC _3,1	0.87	0.97	0.87	0.77	0.92	0.91
SEM	1.62	0.04	0.47	0.56	1.11	0.28
SEM (%)	3.90	5.06	7.46	5.60	5.11	2.34
MD	4.49	0.13	1.30	1.56	3.06	0.78