Bioelectrical Impedance Analysis and Manual Measurements of Neck Circumference Are Interchangeable, and Declining Neck Circumference Is Related to Presarcopenia

Table 2

Correlation coefficient (), ICC, and Bland-Altman analysis in NC measured by two methods: manual and BIA.

	Total	Male	Female
Spearman	0.90	0.81	0.83
ICC	0.95	0.90	0.90
Bland-Altman analysis
Bias (BIA-manual)	−1.07	−1.23	−0.96
SD	1.51	1.39	1.57
95% LOA	−4.02 to 1.89	−3.96 to 1.50	−4.04 to 2.12
Percentage error (%)	4.38	3.81	4.58

; : correlation coefficient; ICC: interclass correlation coefficients; NC: neck circumference; BIA: bioelectrical impedance analysis; SD: standard deviation; LOA: limits of agreement.