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DPpackage (version 1.1-7.4)

igg: Immunoglobulin G concentrations

Description

This data set consider information on the serum immunoglbulin G (IgG) concentration from 298 children aged 6 months to 6 years old. The data were reported by Isaacs et al. (1983). These data were further analysed by Royston and Wright (1998) and Kapitula and Bedrick (2005) using the parametric exponential normal family, which includes parameters for skew and kurtosis that can be functions of covariates.

Usage

data(igg)

Arguments

Format

A data frame with 298 observations on the following 2 variables.

age

a numeric vector giving the age of the children (in years).

igg

a numeric vector giving the the serum IgG concentration.

References

Kapitula, L. R., Bedrick, E. J. (2005). Diagnostics for the exponential normal growth curve model. Statist. Med. 24: 95 - 108.

Royston, P., Wright, E. M. (1998). A method for estimation age-specific reference intervals ('normal ranges') based on fractional polynomials and exponential transformation. J. R. Statist. Soc. A 161: 79 - 101.

Examples

Run this code
# NOT RUN {
data(igg)
## maybe str(igg) ; plot(igg) ...
# }

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