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Adding Fields from the CDASH Model

1. Using the root variables and variables and other CDASH metadata in the in the CDASH Model, add any additional variables that variables that are needed to meet the requirements the requirements of data collection. Follow CDISC Variable Naming Fragment (see Appendix B,  Glossary and Abbreviations) CDISC Variable-naming Fragments conventions, and CDASH root variable-naming conventions where they exist (e.g., --DAT for dates, --TIM for times, --YN for prompts, as described in the CDASH Model). 
   Example: Replace "--" with the 2-character domain code that matches the other variables in the same domain. For example, to add the --LOC variable to a Medical History CRF, the domain code is MH, so the variable would become MHLOC in that domain.

   
   

2. The Question Text and Prompt columns in the CDASH Model metadata provide different variations in the recommended text for asking the question on a CRF. For each question, the sponsor may elect to either use the Question Text or the Prompt on the CRF. Some text is presented using brackets [ ], parentheses ( ), and/or incorporating forward slashes. These different formats are used to indicate how the Question Text or Prompt may be modified by the sponsor.

   1. The text inside the brackets provides an option on the verb tense of the question, or text that can be replaced with protocol-specific verbiage.

   2. The text inside the parentheses provides options (e.g., singular/plural), or text that may be eliminated.

   3. Text separated with a forward slash provides optional words that the sponsor may choose.

      Example: The CDASH variable --PERF, from the CDASH Model, has the following Question Text and Prompt.

      Question Text:  [Were any/Was the] [--TEST/ topic] [measurement(s)/test(s)/examination(s)/specimen(s)/sample(s)] [performed/collected]?

       Prompt:  [--TEST/Topic] [Measurement(s)/Test(s)/Examination(s)/Specimen(s)/Sample(s)] [Performed/Collected]?

      The sponsor wants to add a question to a CRF that asks whether a lab specimen was collected, using a Yes/No response.

      The sponsor selects the CDASH variable --PERF and adds the appropriate domain code. LBPERF  

      Use either the Prompt or the Question Text on the CRF.

      Question Text: Was the laboratory specimen collected?

      • In the first set of brackets, the text option "Was the" is selected, as the study required only 1 lab test to be performed. [Were any/Was the] 
      • In the second set of brackets, the text used is "laboratory," which is the topic of interest. [--TEST/Topic (laboratory)]
      • In the third set of brackets, the text option "specimen," without the optional "s," is selected. [measurement(s)/test(s)/examination(s)/specimen(s)/sample(s)]
      • In the fourth set of brackets, the text option "collected" is selected. [performed/collected]

      Prompt: Laboratory Specimen Collected

      •  In the first set of brackets, the text used is the topic of interest (i.e., laboratory). [--TEST/Topic (Laboratory)] 
      • In the second set of brackets, the text option "specimen," without the optional "s," is selected. [Measurement(s)/Test(s)/Examination(s)/Specimen(s)/Sample(s)]
      • In the third set of brackets, the text option "collected" is selected. [Performed/Collected]

      
      

3. Create custom domains based on 1 of the General Observation Classes in the CDASH Model. See Section 3.4, How to Create New Data Collection Fields When No CDASHIG Field Has Been Defined, for more information.

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