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The MULTTEST Procedure |

**TEST***name ( variables < / options >)***;**

CA | requests the Cochran-Armitage linear trend tests
for group comparisons. The test variables should
take the value 0 for a failure and 1 for a success.
The PERMUTATION= option can be used to request
an exact permutation test; otherwise,
a Z-score approximation is used. The CONTINUITY=
option can be used to specify a continuity correction
for the Z-score approximation. |

FISHER | requests Fisher exact tests for comparing two treatment groups. The test variables should take the value 0 for a failure and 1 for a success. |

FT | requests Z-score CA tests based upon the Freeman-Tukey
double arcsine transformation of the frequencies. The test
variables should take the value 0 for a failure and 1 for a
success. |

MEAN | requests the t-test for the mean. The test variables
can take on any numeric values. |

PETO | requests the Peto mortality-prevalence test. The test variables should take the value 0 for a failure, 1 for a success, and 2 for a fatality. The TIME= option should be used with the PETO test to specify a variable giving the age at death. The CONTINUITY= option can be used to specify a continuity correction for the test. |

test ca(d1-d2) mean(c1-c2);but the statement

test ca(d1-d2) ft(d1-d2);is invalid.

You can specify the following options in the TEST statement (some apply to only one test).

**BINOMIAL**-
specifies that the binomial variance estimate be used for CA and
PETO tests in their asymptotic normal approximations. The default
is to use the hypergeometric variance.
**CONTINUITY=***number***C=***number*-
specifies
*number*as a particular continuity correction for the*Z*-score approximation in the CA and PETO tests. The default is 0. **LOWERTAILED****LOWER**-
is used to make all tests lower-tailed. All tests are
two-tailed by default.
**PERMUTATION=***number***PERM=***number*-
specifies that
*p*-values for the CA and PETO tests be computed using exact permutation distributions when marginal success or failure totals within a stratum are*number*or less. For values greater than*number*(or when the PERMUTATION= option is omitted), PROC MULTTEST uses standard normal approximations with a continuity correction chosen to approximate the permutation distribution. PROC MULTTEST computes the appropriate convolution distributions when you use the STRATA statement along with the PERMUTATION= option. **TIME=***variable*-
identifies the PETO test variable containing the age at death, which
is assumed to be integer valued. If the TIME= option is omitted,
all ages are assumed to equal 1.
**UPPERTAILED****UPPER**-
is used to make all tests upper-tailed. All tests are two-tailed by
default.

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