..-
help for ^symmetry^ (Statalist distribution)
..-
Symmetry and Marginal Homogeneity test for matched samples/ TDT test
- --------------------------------------------------------------------
^symmetry^ var_cases var_controls [^if^ exp] [^in^ range] [^,^ ^not^able ^con^trib ^ex^act]
Description
- -----------
^symmetry^ performs symmetry and marginal homogeneity tests on square NxN
tables where there is a 1 to 1 matching of cases and controls
(non-independence). In genetics, the test is known as the
Transmission/Disequilibrium test (TDT) and is used to test the association
between transmitted and non-transmitted parental marker alleles to an affected
child.
Options
- -------
^notable^ suppresses the output of the contingency table.
^contrib^ reports the contribution of each off-diagonal cell-pair to the
overall symmetry chi-square.
^exact^ performs an exact test of table symmetry. CAUTION: the exact test
requires substantial amounts of time and memory for large tables.
Examples
- --------
. ^symmetry cases controls^
. ^symmetry cases controls, not^
. ^symmetry cases controls, con^
. ^symmetry cases controls, not con^
. ^symmetry cases controls, ex con^
Author
- ------
Mario Cleves .
Also see
- --------
On-line: @epitab@