Response to letters to the editor regarding our paper “Early introduction of complementary foods and childhood overweight in breastfed and formula-fed infants in the Netherlands: the PIAMA birth cohort study”
We thank Albakri & Watson and Erliana for their responses to our paper, in which they propose additional potential confounders in the association of early introduction of complementary foods (CF) and higher risk of overweight during childhood.
Albakri and Watson state that our study could be strengthened by adjustment for physical activity, parental BMI and energy intake during childhood. In our view, these factors may play different roles in the association of early introduction of CF with childhood overweight:
Energy intake and physical activity are associated with overweight development. These factors as well as parental BMI, could be considered as indicators of family lifestyle and could thus confound the association between the timing of CF introduction and development of overweight if family lifestyle influences the timing of CF introduction. In our analyses, we adjusted for a number of important indicators of familial lifestyle, namely maternal educational level,...
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Conflict of interest
Linda Pluymen, Alet Wijga, Ulrike Gehring, Gerard Koppelman, Henriëtte Smit, Lenie van Rossem. On behalf of all authors, the corresponding author states that there is no conflict of interest.
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