Table 2 Effect of piglet type (sIUGR, LBW, MBW, or HBW) on computed tomography measurements at birth.

Items¹	Piglet type³				SEM	P-value⁴
Items¹	sIUGR	LBW	MBW	HBW	SEM	P-value⁴
n	6	6	6	6
EBV (cm³)	57.13^c	105.97^b	122.07^b	182.79^a	4.932	< 0.001
REBV (cm³/kg BW)	114.99	109.11	103.87	108.43	6.189	0.558
(%) of bones between
HU² 140 and HU 499	92.85^a	90.88^b	90.19^c	88.29^d	0.041	< 0.001
HU 500 and HU 999	6.95^d	8.73^c	9.35^b	11.18^a	0.040	< 0.001
HU 1000 and HU 1499	0.20^d	0.39^c	0.45^b	0.52^a	0.009	< 0.001
HU 1500 and HU 1700	0.00^b	0.00^b	0.01^ab	0.01^a	0.001	< 0.001
Left tibia measures
Cortical area (mm²)	13.40^c	20.25^b	26.40^b	35.67^a	1.920	< 0.001
Mean HU	578.98	573.00	661.16	680.44	33.348	0.041
Thickness (mm)	1.50^b	1.48^b	2.19^ab	2.66^a	0.237	0.004

¹EBV = Entire bone volume, REBV = Relative entire bone volume, HU = Hounsfield unit. ²Hounsfield units are a standardized, dimensionless unit used in computed tomography scans to quantify the density of tissues and fluids. ³sIUGR = Severe intrauterine growth restricted, LBW = Low birth weight, MBW = Moderate birth weight, HBW = High birth weight. ⁴P-value obtained from ANOVA test. ^{a, b,c, d}Different superscripts within row indicate significant differences (P ≤ 0.05).

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