Table 2. Associations of FM% at 3 and 6 months with infant and maternal variables.

	FM% at 3 months		FM% at 6 months
	β	p-value	β	p-value
Infant characteristics
Gestational age (weeks)	-0.67	0.01	-0.40	0.18
Birthweight SDS	0.11	0.71	-0.14	0.68
Birth length SDS	-0.10	0.78	-0.01	0.99
At 1 month
W/L SDS	1.58	<0.001	0.96	0.02
FM%	0.46	<0.001	0.32	<0.001
Delta W/L SDS0-1mo	1.05	0.08	0.59	0.34
At 3 months
W/L SDS	2.94	<0.001	2.10	<0.001
FM%			0.72	<0.001
Delta W/L SDS1-3mo	2.86	<0.001	2.53	<0.001
Delta FM%1-3mo	0.53	<0.001	0.40	<0.001
At 6 months
W/LSDS			2.87	<0.001
Delta W/L SDS3-6mo			1.92	0.002
Delta FM%3-6mo			0.52	<0.001
Duration of exclusive breastfeeding (wks)	0.08	0.02	0.13	<0.01
Maternal variables^
Age (y)	0.07	0.33	0.13	0.10
Height of mother (cm)	-0.06	0.38	-0.03	0.61
Maternal pre-pregnancy BMI (kg/m2)	-0.15	0.11	-0.10	0.31
Maternal weight gain during pregnancy (kg)	0.01	0.76	0.01	0.83
Parity mother	0.88	0.04	0.55	0.23
Smoking mother during pregnancy (yes/no)	0.87	0.58	1.16	0.49
Ethnicity	0.17	0.06	0.18	0.09
Educational level	0.00	0.36	0.00	0.83

Values presented are results of multiple linear regression. β=unstandardized regression coefficient. All models are adjusted for gender and age.

^{^}Adjusted for birth weight. 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