Identification of Differences in Body Composition Measures Using 3D-Derived Artificial Intelligence from Multiple CT Scans across the L3 Vertebra Compared to a Single Mid-Point L3 CT Scan

Table 2

Average percent difference (%) in muscle, VAT, SAT area, and radiodensity between the mid-L3 slice and non-mid-L3 slices in all patients and by sex. For each patient, the average percent difference was calculated by averaging (absolute value ((each L3 slice (excluding mid-L3) body composition–mid-L3 body composition)/mid-L3 body composition) × 100).

	All (n = 203)	Sex split
		Female (n = 106 patients)	Male (n = 97 patients)	value (male vs female)
	Average percent difference (%) median (interquartile range)
SM surface area	3.58% (2.62–4.66)	3.64% (2.62–4.67)	3.54% (2.57–4.63)	0.96
Muscle radiodensity	2.85% (2.00–4.00)	3.02% (2.03–4.26)	2.74% (1.89–3.71)	0.09
VAT surface area	6.28% (3.94-10.79)	6.90% (4.62-11.27)	5.23% (3.33–8.99)	0.02
VAT radiodensity	1.28% (0.86–2.04)	1.32% (0.85–2.05)	1.23% (0.90–2.00)	0.85
SAT surface area	5.49% (3.30–7.35)	4.33% (2.38–6.22)	6.6% (4.64–8.31)	<0.001
SAT radiodensity	0.85% (0.57–1.27)	0.76% (0.50–1.13)	0.97% (0.65–1.35)	0.007