CONDITIONAL

Purpose

Define risk-set (stratum) size threshold for use of conditional likelihoods in analyses of matched case-control studies

Programs

GMBO/PECAN

Syntax

CONDITIONAL { THRESHOLD # } @

Arguments

THRESHOLD #

Specifies the risk set size threshold  for the use of the conditional likelihood when fitting models for the odds ratio in analysis of matched case-control  data or when fitting stratified models for the odds ratio with binomial data.  The conditional likelihood is used when the risk-set (or stratum) size is less than or equal to the threshold value while the unconditional likelihood is used for risk-sets (strata) for which the size is greater than the threshold.   The default threshold value is 50.

Remarks

The default for stratified the models GMBO/PECAN is to use the conditional likelihood for strata with fewer than 50 records and the unconditional likelihood for larger strata.  The UNCONDITIONAL command is used to indicate that the unconditional likelihood is to be used for all strata, regardless of the number of records in the strata.

See Also

UNCONDITIONAL