Capturing cognitive and behavioral variability among individuals with Down syndrome: a latent profile analysis

Area of Science:

• Neuroscience
• Genetics
• Psychology

Background:

• Down syndrome presents a wide spectrum of cognitive and behavioral characteristics.
• The Down Syndrome Cognition Project collected extensive data to address this variability.
• Focus on individuals aged 6-25 years.

Purpose of the Study:

• To characterize cognitive and behavioral variability in Down syndrome.
• To identify distinct subgroups within the Down syndrome population based on cognitive and behavioral profiles.

Main Methods:

• Latent profile analysis of 314 participants.
• Data included cognition (IQ, executive functioning), adaptive/maladaptive behavior, and autism spectrum disorder (ASD) symptomatology.
• Multivariate multinomial regression examined demographic correlates.

Main Results:

• A 3-class model was supported: 'normative' (48%), 'cognitive' (35%), and 'behavioral' (17%).
• Each class showed unique cognitive and behavioral profiles.
• Household income and sex differed across classes.

Conclusions:

• Subtyping the Down syndrome phenotype is crucial for targeted interventions and etiologic research.
• Latent profile analysis is effective for identifying Down syndrome subtypes.
• Findings emphasize the heterogeneity of Down syndrome.