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Breastfeeding and Birth Order Modify Food Insecurity's Associations with Inadequate and Excessive Infancy Weight Gain
Author(s) -
MetallinosKatsaras Elizabeth Sophia,
Siu Elizabeth Colavito,
Colchamiro Rachel
Publication year - 2013
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.27.1_supplement.108.4
Subject(s) - breastfeeding , medicine , logistic regression , pediatrics , weight gain , food insecurity , demography , low birth weight , birth weight , breast feeding , food security , body weight , pregnancy , biology , ecology , genetics , sociology , agriculture
Objective To assess the associations between household (HH) food security status (FSS), and excessive (EWG) and inadequate (IWG) weight gain among low income infants. Sample infants on WIC (2001–2009) with complete data (n=31,423) on weight and length in early (2 months) and late (12 months) infancy, HH FSS in early (0–6 mos) and late (12 + 2 months) infancy, breastfeeding and covariates. Outcomes The following were based on changes in weight‐for‐length z‐scores (WHO) between early and late infancy: 1) EWG = >; 2 z‐score increase 2) IWG= >; −1 z‐score decline. Analysis Multivariate Logistic Regression. Results EWG: among first born infants, effects of late infancy HH food insecurity (FI) were modified by: 1) early HH FSS (p < .05), 2) whether the infant was breastfed (p < .01). Among subsequently born infants: 1) persistently low HH FSS (vs. persistent food security) increased risk of EWG (AOR=1.29, 95% CI= 1.10–1.52), 2). Among never breastfed infants, late infancy low HH FSS (vs. late food security) increased risk of EWG (AOR=1.24, 95% CI=1.05–1.47). IWG: Among first born infants, a significant interaction between late FSS and breastfeeding (p=.02) indicated that among never (but not ever) breastfed infants, any HH FI in late infancy (vs. food security), significantly elevated risk of IWG (AOR=1.60, 95% CI=1.19–2.16). Breastfeeding may buffer against adverse effects of FI on infant weight gain. Funding: ERS/USDA