ArticleBMJ open2024
Stability and predictability of Bayley Scales of Infant and Toddler Development: evidence from a south Indian birth cohort prospective study.
Article in BMJ open, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesThere is limited information about the stability and predictability of Bayley Scales of Infant and Toddler Development (BSID) assessing child development in low- and middle-income settings. The objective of the present study was to analyse stability and predictive validity of BSID using an existing birth cohort.
designProspective birth cohort follow-up study. SETTING AND
participantsA community-based birth cohort of 251 newborns was recruited and followed-up in urban Vellore, South India, until 9 years of age. Using BSID-III, child development was measured at 6, 15, 24 and 36 months. Cognition was assessed using the Wechsler Preschool Primary Scales of Intelligence at 5 years, and the Malin's Intelligence Scale for Indian Children scale at 7 and 9 years of age. The stability of BSID measurements across time points was expressed by intraclass correlation (ICC) and concordance correlation coefficients. Linear regression was used to describe the predictability of BSID-III of cognition at 5, 7 and 9 years.
resultsThe ICC for domain-wise BSID scores between time points of measurement suggested a weak correlation. The BSID scores at 36 months correlated best with Full-Scale Intelligence Quotient (FSIQ) at 5 years (r: 0.40-0.49), 7 years (r: 0.35-0.48) and 9 years (r: 0.36-0.38). BSID scores at 36 months predicted FSIQ better at 5, 7 and 9 years with R
conclusionPoor stability and predictability of BSID warrant caution in the predictive projection of early childhood assessments. Better predictability of future cognition of 36 months' BSID scores highlights its advantage over the 24 months' assessment.
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