We discuss a practical and effective framework to estimate reference growth charts via regression quantiles. Inequality constraints are used to ensure both monotonicity and non-crossing of the estimated quantile curves and penalized splines are employed to model the nonlinear growth patterns with respect to age. A companion R package is presented and relevant code discussed to favour spreading and application of the proposed methods.
|Numero di pagine||13|
|Rivista||Environmental and Ecological Statistics|
|Stato di pubblicazione||Published - 2013|
All Science Journal Classification (ASJC) codes