Table 3.

Descriptive summary of ultrasound‐measured muscle thickness using the nine‐site protocol

Variable median (IQR)	All (n = 96)	Men (n = 41)	Women (n = 55)	P‐value	Younger (<60, n = 55)	Older (≥60, n = 41)	P‐value
Anterior upper arm, cm	2.76 (2.31–3.50)	3.55 (3.20–3.86)	2.37 (2.20–2.70)	<0.001	2.99 (2.34–3.45)	2.67 (2.29–3.53)	0.364
Posterior upper arm, cm	2.32 (1.75–3.03)	3.06 (2.56–3.61)	1.93 (1.56–2.31)	<0.001	2.51 (1.98–3.38)	1.95 (1.50–2.57)	<0.001
Anterior forearm, cm	1.58 (1.29–1.84)	1.80 (1.55–2.06)	1.36 (1.16–1.61)	<0.001	1.69 (1.31–1.94)	1.47 (1.27–1.70)	0.046
Abdominal, cm	1.02 (0.82–1.34)	1.16 (0.84–1.59)	0.99 (0.77–1.19)	0.039	1.23 (1.01–1.49)	0.80 (0.65–0.95)	<0.001
Subscapular, cm	0.81 (0.63–1.02)	0.96 (0.76–1.24)	0.70 (0.55–0.92)	<0.001	0.83 (0.64–1.01)	0.75 (0.61–1.05)	0.612
Anterior upper leg, cm	3.34 (2.57–3.89)	3.77 (3.12–4.39)	2.96 (2.46–3.52)	<0.001	3.77 (3.12–4.38)	2.65 (2.25–3.23)	<0.001
Posterior upper leg, cm	5.15 (4.53–5.69)	5.46 (4.80–5.93)	4.83 (4.43–5.37)	0.006	5.39 (5.04–5.98)	4.55 (4.19–5.17)	<0.001
Anterior lower leg, cm	2.57 (2.33–2.81)	2.81 (2.61–3.11)	2.40 (2.27–2.58)	<0.001	2.55 (2.33–2.79)	2.60 (2.40–2.89)	0.201
Posterior lower leg, cm	5.68 (5.09–6.22)	6.19 (5.60–6.89)	5.14 (4.84–5.55)	<0.001	5.81 (5.37–6.26)	5.48 (4.78–6.19)	0.060
Nine‐site total, cm	24.69 (22.12–28.61)	28.64 (27.08–31.54)	22.83 (21.28–24.53)	<0.001	27.46 (23.53–30.11)	22.83 (21.06–26.68)	<0.001

IQR, interquartile range.