case0202: Anatomical Abnormalities Associated with Schizophrenia

Description Usage Format Source References Examples

Description

Are any physiological indicators associated with schizophrenia? In a 1990 article, researchers reported the results of a study that controlled for genetic and socioeconomic differences by examining 15 pairs of monozygotic twins, where one of the twins was schizophrenic and the other was not. The researchers used magnetic resonance imaging to measure the volumes (in cm$^3$) of several regions and subregions of the twins' brains.

Usage

1

Format

A data frame with 15 observations on the following 2 variables.

Unaffect

volume of left hippocampus of unaffected twin (in cm^3)

Affected

volume of left hippocampus of affected twin (in cm^3)

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Suddath, R.L., Christison, G.W., Torrey, E.F., Casanova, M.F. and Weinberger, D.R. (1990). Anatomical Abnormalities in the Brains of Monozygotic Twins Discordant for Schizophrenia, New England Journal of Medicine 322(12): 789–794.

Examples

1
2
str(case0202)
with(case0202, stem(Unaffect-Affected, scale=2))

Example output

'data.frame':	15 obs. of  2 variables:
 $ Unaffect: num  1.94 1.44 1.56 1.58 2.06 ...
 $ Affected: num  1.27 1.63 1.47 1.39 1.93 ...

  The decimal point is 1 digit(s) to the left of the |

  -1 | 9
  -0 | 
   0 | 23479
   1 | 0139
   2 | 3
   3 | 
   4 | 0
   5 | 09
   6 | 7

Sleuth2 documentation built on Jan. 24, 2019, 9:04 a.m.