Table 3. Associations of ultrasound measurements at 3 and 6 months with infant and maternal variables.

	At 3 months				At 6 months
	Visceral fat		Subcutaneous fat		Visceral fat		Subcutaneous fat
	β	p-value	β	p-value	β	p-value	β	p-value
Infant variables
Gestational age (weeks)	-0.05	0.13	0.01	0.07	0.00	0.74	0.00	0.68
Birthweight SDS	-0.02	0.67	0.00	0.35	0.04	0.83	0.00	0.84
Birth length SDS	-0.03	0.45	0.01	0.15	0.10	0.01	0.00	0.88
At 1 month
W/L SDS	0.02	0.76	0.02	0.04	0.03	0.52	0.02	0.05
FM%	-0.01	0.11	0.01	0.01	0.00	0.62	0.00	0.30
Delta W/L SDS0-1mo	-0.13	0.07	0.05	0.002	0.07	0.31	0.00	0.88
At 3 months
W/LSDS	0.07	0.20	0.04	<0.001	0.04	0.44	0.04	<0.001
FM%	0.00	0.63	0.01	<0.01	0.00	0.76	0.01	<0.001
Delta W/L SDS1-3mo	0.16	0.01	0.02	0.16	0.00	0.95	0.04	<0.001
Delta FM%1-3mo	0.02	0.02	0.01	0.01	0.00	0.99	0.01	<0.001
At 6 months
W/L SDS					0.10	0.02	0.05	<0.001
FM%					0.09	0.09	0.01	<0.001
Delta W/L SDS3-6mo					0.14	0.06	0.04	0.004
Delta FM%3-6mo					0.03	0.02	0.01	<0.001
Duration of exclusive breastfeeding (wks)	0.00	0.49	0.00	0.01	0.00	0.74	0.00	0.01
Maternal variables
Age(y)	0.00	0.91	0.00	0.57	0.02	0.13	0.00	0.06
Height of mother (cm)	-0.01	0.08	0.00	0.64	-0.01	0.19	0.00	0.05
Maternal pre-pregnancy BMI (kg/m2)	0.01	0.43	0.00	0.13	0.00	0.18	0.00	0.57
Maternal weight gain during pregnancy (kg)	0.01	0.14	0.00	0.46	0.00	0.18	0.00	0.20
Parity mother	-0.02	0.79	0.02	0.15	0.07	0.17	0.02	0.02
Smoking mother during pregnancy (yes/no)	0.30	0.11	-0.07	0.10	0.00	1.00	-0.01	0.78
Ethnicity	0.00	0.78	0.00	0.65	0.02	0.09	0.00	0.17
Educational level	0.00	0.47	0.00	0.42	0.00	0.62	0.00	0.42

Values presented are results of multiple linear regression. β=unstandardized regression coefficient. All models are adjusted for gender and age. W/L_SDS = weight for length SDS. Delta W/L_SDS= gain in weight for length SDS. Delta FM%=gain in FM%

Significant p-values are indicated in boldface.