Convert a Decision Label to an Integration Decision Value

Converts "Efficacy", "Futility", or "Continue" into the integer decision value expected by the analysis integration point. The result depends on the tail direction, the boundaries enabled by LookInfo$RejType, and whether the current look is interim or final.

Supported LookInfo$RejType values are:

• 0 or 2: efficacy boundary only.

• 1 or 3: futility boundary only.

• 4 or 5: efficacy and futility boundaries.

A fixed design is represented by LookInfo = NULL and is treated as an efficacy-only final analysis.

Usage

GetDecision(strDecision, DesignParam, LookInfo = NULL)

Arguments

strDecision

Character string equal to "Efficacy", "Futility", or "Continue".

DesignParam

List containing TailType, where 0 is left-tailed and 1 is right-tailed.

LookInfo

Optional list containing RejType, CurrLookIndex, and NumLooks.

Value

Integer decision value: 0 for no boundary crossed, 1 for lower efficacy, 2 for upper efficacy, or 3 for futility.