In terms of pediatric population, what is the definition of "infants and toddlers" according to the classifications?

The classification of "infants and toddlers" in the pediatric population is defined as individuals from 28 days to 23 months old. This classification encompasses a crucial developmental period where infants transition from newborns to toddlers, highlighting significant growth and developmental milestones.

This age range is essential for clinical research and practice because it addresses the specific health care needs and developmental considerations associated with this stage of life. Understanding this classification helps healthcare professionals design appropriate studies and interventions tailored to this vulnerable age group, ensuring that strategies consider their physiological and developmental characteristics. The other choices reflect different age ranges that are not appropriate for this classification. For instance, 0 to 27 days pertains to newborns, while 2 to 11 years and 12 to 17 years represent older children and adolescents, respectively.