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Breastfeeding is recommended until 6 months of age, but a wide range of infant formula is available for nonbreastfed or partially breastfed infants. Our aim was to describe infant formula selection and to examine social- and health-related factors associated with this selection. Analyses were based on 13,291 infants from the French national birth cohort Etude Longitudinale Française depuis l'Enfance. Infant diet was assessed at Month 2 by phone interview and monthly from Months 3 to 10 via internet/paper questionnaires. Infant formulas were categorized in 6 groups: extensively or partially hydrolysed, regular with or without prebiotics/probiotics, and thickened with or without prebiotics/probiotics. Associations between type of infant formula used at 2 months and family or infant characteristics were assessed by multinomial logistic regressions. At Month 2, 58.1% of formula-fed infants were fed with formula enriched in prebiotics/probiotics, 31.5% with thickened formula, and 1.4% with extensively hydrolysed formula. The proportion of formula-fed infants increased regularly, but the type of infant formula used was fairly stable between 2 and 10 months. At Month 2, extensively hydrolysed formulas were more likely to be used in infants with diarrhoea or regurgitation problems. Partially hydrolysed formulas were more often used in families with high income, with a history of allergy, or with infants with regurgitation issues. Thickened formulas were used more with boys, preterm infants, infants with regurgitation issues, or in cases of early maternal return to work. The main factors related to the selection of infant formula were family and infant health-related ones. [ABSTRACT FROM AUTHOR]

We described the introduction of complementary food (ICF) during the first year of life and identify associations observed with maternal and infant characteristics. We studied 3368 children included in the Epifane cohort, France, 2012. Maternal and infant characteristics and age at introduction of 28 complementary foods were collected at birth and at 1, 4, 8 and 12 months. Kaplan-Meier plots were used to represent probabilities of ICF. A score was used as tertiles in multinomial logistic regression to identify maternal and infant factors associated with ICF agreement with French recommendations. Median age of ICF was 152 days. While 12.6% of infants received complementary food before the age of 4 months, 95% of them were introduced after 7 months. Recommendations were generally followed, except for eggs and added fats, introduced in only 23.2% and 53.1% of 1-year-old infants, respectively. Factors significantly associated with the first ICF score tertile (low agreement with recommendations) vs. third tertile were as follows: maternal age 18-24 years (OR = 2.24 [1.49-3.35]) or 25-29 years (OR = 1.57 [1.21-2.04]), education less than or equal to high school graduation (OR = 1.94[1.51-2.48]), birthplace in France (OR = 2.13 [1.41-3.21]), three or more children (OR = 1.70 [1.15-2.51]), no follow-up antenatal classes (OR = 1.58 [1.22-2.04]), unemployment before and after pregnancy (OR = 1.64 [1.04-2.59]), unemployment before pregnancy and return to work within 12 months (OR = 2.06 [1.05-4.02]), no breastfeeding (OR = 2.08 [1.55-2.79]) or lasting <28 days (OR = 1.68 [1.22-2.31]) or 1-4 months (OR = 1.45 [1.08-1.96]). Recommendations concerning complementary food were generally followed. However, guidelines should be clarified and adapted to families who have difficulties in adopting them. [ABSTRACT FROM AUTHOR]