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Age at introduction of complementary food and physical growth from 2 to 9 months in rural Senegal
1ORSTOM, Institut Français de Recherche Scientifique pour le Développement en Coopération, Montpellier, France.
Insights
Introducing complementary foods (CF) early, at 2-3 months, was linked to poorer infant nutritional status but not slower growth. Later introduction, by 4-5 months, showed slightly slower linear growth in infants.
Area of Science:
- Pediatrics
- Nutrition Science
- Growth Monitoring
Background:
- Optimal timing for introducing complementary foods (CF) is crucial for infant nutrition and growth.
- Early or delayed introduction of CF can impact infant health outcomes.
- Understanding the relationship between CF introduction age and physical development is essential for public health guidelines.
Purpose of the Study:
- To compare the nutritional status and physical growth of infants based on the age they started complementary feeding (CF).
Main Methods:
- A longitudinal observational study was conducted in rural Senegal.
- 522 infants aged 2-3 months were recruited; data from 420 infants were analyzed.
- Key outcomes measured were increments in length and weight between visits.
Main Results:
- Infants introduced to CF at 2-3 months showed significantly lower length-for-age, weight-for-length, and arm circumference compared to predominantly breastfed infants.
- No significant difference in weight and length growth from 2-3 to 9-10 months was observed between early and later CF introduction groups.
- Introduction of CF by 4-5 months was associated with slightly slower linear growth between 4-5 and 6-7 months compared to later introduction.
Conclusions:
- Early introduction of CF (by 2-3 months) was associated with poorer initial nutritional status but did not impede overall growth up to 9-10 months.
- Introducing CF by 4-5 months showed a slight association with slower linear growth compared to later introduction.
- The findings suggest a nuanced approach to CF timing, balancing nutritional status and growth considerations.
Objective:
To compare nutritional status and physical growth among infants according to age at introduction of complementary food (CF).
Design:
A longitudinal observational study.
Setting:
Three health clinics in a rural area of Senegal.
Subjects:
During immunization sessions, 522 infants were recruited at 2-3 months. Complete data on three visits were available for 420 infants (4 visits: n = 361); 73 were lost to follow-up and 29 had incomplete data.
Main Outcome Measures:
Increments in length and weight between adjacent visits.
Results:
Infants complemented at 2-3 months (n = 50) had significantly lower length-for-age (P = 0.014), weight-for-length (P < 0.001) and arm circumference (P < 0.0001) at 2-3 months than predominantly breastfed infants (n = 370), after adjustment for residence, mother's age and education of parents. The growth in weight and length from 2-3 to 9-10 months did not differ. The infants complemented by 4-5 months, but not yet at 2-3 months, (n = 94) had a slightly lower length increment from 4-5 to 6-7 months (1.42 vs 1.53 cm/mo, p < 0.05) compared to infants predominantly breastfed at 4-5 months (n = 276). The infants first complemented by 6-7 months (n = 122) had increments from 6-7 to 9-10 months similar to those of predominantly breastfed infants (n = 154).
Conclusion:
Introduction of CF by 2-3 months was associated with a low nutritional status, but not with slow growth from 2-3 to 9-10 months. Introduction of CF by 4-5 months was associated with slightly slower linear growth compared to later introduction.
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