Fecal microbiota composition concerning body mass index and early-life factors in Mexican preschool-aged children: a cross-sectional study.

Results Clinical data Perinatal and postnatal clinical factors obtained from the medical records of the participants in the study show that some of these characteristics (type of childbirth; skin-to-skin contact, hospitalization at birth, and incubator required) did not show a clear trend that allows establishing a relationship between the factors measured and BMI, even so, we were able to observe that only 20% of normal-weight children had premature gestation, of the 80% who were born full term, 84.9% had optimal birth weights (2.5–4 kg), as detailed in Table 1 .

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