Table 1.

Multivariable regression model^a to estimate modification of IYCF on stunting at 18 mo by mother-infant FUT2+/FUT3− phenotype among 610 infants in whom mother and infant FUT2 and FUT3 status was ascertained.

	Main effects			IYCF-by-FUT2 and FUT3 phenotype combination interaction effects
	PD (95% CI)	p-value	Adjusted p-valueb	Prevalence difference-in-differences (95% CI)	p-value	Adjusted p-valueb
Both FUT2+/FUT3−	ref	ref	ref	ref	ref	ref
None FUT2+/FUT3−	12.9% (0.6%, 25.2%)	0.041	0.122	−21.5% (−41.9%, −1.0%)	0.039	0.118
Infant only FUT2+/FUT3−	15.2% (−2.6%, 33.0%)	0.094	0.283	−21.1% (−48.2%, 6.0%)	0.127	0.191
Mom only FUT2+/FUT3−	28.9% (13.6%, 44.3%)	<0.001	0.001	−32.6% (−55.3%, −9.9%)	0.005	0.015
IYCF	16.5% (−1.8%, 34.8%)	0.077	0.177

PD, prevalence difference (in percentage points); 95% CI, 95% confidence interval; IYCF, infant and young child feeding.

^aCovariates include birthweight, infant sex, age at the 6 mo visit, infant LAZ at the 6 mo visit, infant diet diversity score at the 6 mo visit, and mother-infant Lewis-null secretor phenotype discordance coded as both, none, infant only or mother only. N's are reported in Table S4.

^bAdjusted for multiple hypothesis testing by the Benjamini-Hochberg method.