Table 3.

Associations between maternal and infant body composition at three months postpartum.

Maternal Predictors	Secretor			Non-Secretor			Interaction
	Parameter Value	SE	p-Value	Parameter Value	SE	p-Value	p-Value
	Infant weight (kg)
FFM (kg)	0.01	0.01	0.51	−0.26	0.12	0.04	0.03
FFMI (kg/m2)	−0.00	0.04	0.98	−0.47	0.14	<0.001	<0.001
	Infant length (cm)
FFM (kg)	0.10	0.04	0.01	−0.66	0.36	0.08	0.04
FFMI (kg/m2)	0.19	0.13	0.16	−1.04	0.47	0.03	0.02
	Infant BMI (kg/m2)
FFMI (kg/m2)	−0.11	0.07	0.11	−0.63	0.2	<0.001	0.01
	Infant log (FFM (kg))
FFM (kg)	0.00	0.00	0.33	−0.04	0.02	0.03	0.02
FFMI (kg/m2)	0.00	0.01	0.83	−0.06	0.02	<0.001	<0.001
	Infant log (FFMI (kg/m2))
Log (BMI (kg/m2))	−0.08	0.07	0.23	−0.34	0.15	0.03	0.13
FFM (kg)	0.00	0.00	0.97	−0.02	0.01	0.03	0.03
FFMI (kg/m2)	−0.00	0.01	0.70	−0.05	0.01	<0.001	<0.001
	Infant FM (kg)
FFMI (kg/m2)	0.01	0.02	0.44	−0.16	0.06	0.01	0.01
	Infant FMI (kg/m2)
FFMI (kg/m2)	0.03	0.05	0.60	−0.42	0.16	0.01	0.01
	Entire cohort
	Infant length (cm)
Log (Weight (kg))	3.48	1.69	0.04	-	-	-	-
	Infant BMI (kg/m2)
Log (BMI (kg/m2))	−2.16	0.9	0.02	-	-	-	-
Log (FM (kg))	−1.24	0.51	0.02	-	-	-	-
FM (%)	−0.06	0.03	0.03	-	-	-	-
Log (FMI (kg/m2))	−1.33	0.51	0.01	-	-	-	-
	Infant FM (%)
Age	−0.17	0.07	0.02	-	-	-	-
	Infant FM/FFM
Age	−0.00	0.00	0.02	-	-	-	-

Data are parameter value ± standard error of measurement (SE). When the interaction term with secretor status was present in the final model, results are separated by secretor and non-secretor groups, whereas when the interaction term was not present in the final model, results are presented for the entire cohort. Significant p-values are indicated by the bold text. BMI—body mass index; FFM—fat-free mass; FFMI—fat-free mass index; FM—fat mass; FM/FFM—fat mass to fat-free mass ratio; FMI—fat mass index.