Early childhood development monitoring during the first thousand days: Investigating the relationship between the developmental surveillance instrument and standardized scales.

Objective: This study aims to investigate the relationship between the Developmental Surveillance Instrument -Instrumento de Vigilância do Desenvolvimento (IVD), found in the Child's Booklet Caderneta da Crianca (CC), and standardized scales: Alberta Infant Motor Scale (AIMS) and Denver Developmental Screening Test (Denver-II).

Methods: Employing an exploratory observational approach, we adopted a prospective longitudinal design with a quantitative approach. The convenience sample included 83 Brazilian children born between May and August 2019 in a public hospital.