University of Cambridge > Talks.cam > MRC Biostatistics Unit Seminars > Patterns of vulnerability in pregnancy and early childhood: Measurement, interactions, effect moderation and random coefficients in latent variable models

Patterns of vulnerability in pregnancy and early childhood: Measurement, interactions, effect moderation and random coefficients in latent variable models

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As yet models for developmental data rarely do justice to the complexity of measurement and process. We examine models for inferring abnormality within a context of developmental delay and for characterising the effects of pre-natal programming. In the first we use the SNAP and MLS studies of autism and specific language impairment to highlight the complex censoring that occurs when we attempt to use โ€œregressionโ€ in language as an indicator of neurodevelopmental abnormality and the counter-intuitive associations to which it gives rise. In the second we explore foetal programming of markers of emotional regulation and the potential compensatory effects of early parenting. We estimate a model using gllamm in which a maternal behaviour latent variable derived from 4 ordinal items by an Item-Response Theory measurement model, moderates the impact of both maternal depression at 32-weeks of pregnancy and poor intra-uterine growth, on 6-month infant vagal tone and on vagal withdrawal in response to a social stressor.

GLLAMM โ€“ Generalized Linear Latent and Mixed Model

This talk is part of the MRC Biostatistics Unit Seminars series.

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