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

Table 1

Demographic, anthropometric, physical function, blood test, and presarcopenia prevalence data of the study participants.

Variables	Total	Male	Female
Number of subjects	318	125	193
Age (years)				0.0002
Body height (cm)				<0.0001
Body weight (kg)				<0.0001
BMI (kg/m^2)				0.0017
PBF (%)				<0.0001
aSMI (kg/m^2)				<0.0001
NC by BIA (cm)				<0.0001
NC by manual (cm)				<0.0001
Grip strength (kg)				<.0001
Back muscle strength (kg)				<0.0001
10 m gait time (s)				0.0001
TUG (s)				0.0014
Albumin (g/dL)				0.6785
Total cholesterol (mg/dL)				<0.0001
Triglycerides (mg/dL)				0.1492
CRP (mg/dL)				0.1266
Prevalence of presarcopenia (%)	60, 18.9%	16, 12.8%	44, 22.8%	0.0357

Evaluated using the Mann–Whitney test and chi-square test. Parameter values are shown as means (standard deviations) or numbers. Bold values indicate significant difference. PBF, aSMI, and NC by BIA were measured using InBody 770 BIA unit. BMI: body mass index; PBF: percent body fat; aSMI: appendicular skeletal muscle index; NC: neck circumference; BIA: bioelectrical impedance analysis; TUG: timed up-and-go; CRP: C-reactive protein.