Ultrasound Estimates of Visceral and Subcutaneous-Abdominal Adipose Tissues in Infancy

Table 3

Prediction models for IA-AT and SCA-AT in the validation study.

	Model^1	Constant	𝐵^6±SE					𝑅^2 (%)	RMSE^7	𝑃 value for model change
			Weight; (kg)	Sex	Age (days)	US SC-abdo depth (cm)^4,5	US-visceral depth (cm)^4
IA-AT (cm^3)^2	1	−1.4	5.9±3.1	—	—	—	—	15	61.3	0.07
	2	−1.5	5.7±3.4	0.4±3.1	—	—	—	16	59.8	0.1
	3	−0.7	4.8±3.4	−0.8 ± 3.2	0.3±0.3	—	—	22	60.0	0.2
	4	23.7	−12.9 ± 8.0	−0.3 ± 2.9	0.4±0.3	113.8±45.4	—	43	53.4	0.1
	5	20.9	−15.0 ± 6.7	2.7±2.6	0.5±0.2	116.6±38.1	6.6±2.3	62	37.4	0.02
SCA-AT (cm^3)^3	1	−42.6	43.6±12.9	—	—	—	—	36	38.2	0.003
	2	−48.6	36.2±13.2	19.8±12.2	—	—	—	44	37.4	0.01
	3	−49.4	37.1±14.0	21.0±13.2	−0.3 ± 1.2	—	—	44	34.8	0.02
	4	66.7	−47.4 ± 0.03	23.4±0.01	0.08±0.09	540.0±171.4	—	65	20.2	0.1

¹Covariables were added sequentially to the prediction models to demonstrate their incremental benefits.
²IA-AT: internal-abdominal adipose tissue volume by MRI.
³SCA-AT: Subcutaneous abdominal adipose tissue volume by MRI.
⁴US: Ultrasound.
⁵SC-abdo: subcutaneous-abdominal.
⁶B: regression coefficient (±respective standard error).
⁷RMSE: root mean square error.
⁸𝑅²: coefficient of determination.