Age of Onset of Schizophrenia Data

Description

Data on sex differences in the age of onset of schizophrenia.

Usage

data("schizophrenia")

Format

A data frame with 251 observations on the following 2 variables.

age

age at the time of diagnosis.

gender

a factor with levels female and male

Details

A sex difference in the age of onset of schizophrenia was noted by Kraepelin (1919). Subsequently epidemiological studies of the disorder have consistently shown an earlier onset in men than in women. One model that has been suggested to explain this observed difference is know as the subtype model which postulates two type of schizophrenia, one characterised by early onset, typical symptoms and poor premorbid competence, and the other by late onset, atypical symptoms, and good premorbid competence. The early onset type is assumed to be largely a disorder of men and the late onset largely a disorder of women.

Source

E. Kraepelin (1919), Dementia Praecox and Paraphrenia. Livingstone, Edinburgh.

Examples

  data("schizophrenia", package = "HSAUR2")
  boxplot(age ~ gender, data = schizophrenia)

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(HSAUR2)
Loading required package: tools
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/HSAUR2/schizophrenia.Rd_%03d_medium.png", width=480, height=480)
> ### Name: schizophrenia
> ### Title: Age of Onset of Schizophrenia Data
> ### Aliases: schizophrenia
> ### Keywords: datasets
> 
> ### ** Examples
> 
> 
>   data("schizophrenia", package = "HSAUR2")
>   boxplot(age ~ gender, data = schizophrenia)
> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>