Modelling Childhood Growth Using Fractional Polynomials and Linear Splines

  title={Modelling Childhood Growth Using Fractional Polynomials and Linear Splines},
  author={Kate M Tilling and Corrie MacDonald-Wallis and Debbie A Lawlor and Rachael A. Hughes and Laura D. Howe},
  booktitle={Annals of nutrition & metabolism},
BACKGROUND There is increasing emphasis in medical research on modelling growth across the life course and identifying factors associated with growth. Here, we demonstrate multilevel models for childhood growth either as a smooth function (using fractional polynomials) or a set of connected linear phases (using linear splines). METHODS We related parental social class to height from birth to 10 years of age in 5,588 girls from the Avon Longitudinal Study of Parents and Children (ALSPAC… CONTINUE READING
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