Table 4.

Observer reliability and reproducibility

	Observer A. T. Z.	Observer A. H.	Inter‐observer		Intra‐observer
	Area cm2	Area cm2	R	P value	R	P value
Right sternocleidomastoid muscle	3.68 (±1.12)	3.82 (±1.21)	0.931	<0.001	0.974	<0.001
Left sternocleidomastoid muscle	3.76 (±1.16)	3.63 (±1.06)	0.963	<0.001	0.957	<0.001
Paravertebral muscles	36.90 (±8.54)	37.27 (±9.02)	0.977	<0.001	0.998	<0.001
Total CSA	44.34 (±10.28)	44.73 (±10.73)	0.982	<0.001	0.997	<0.001

CSA, cross‐sectional area.

Observer agreement of measured CSA (cm²) at level of C3 in 25 neck computed tomography scans analysed with bivariate Pearson's r correlation coefficient. The normal distributed data are presented with mean (SD). Underscored P values are significant (α < 0.05).