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© 2023 Clinical Data Interchange Standards Consortium, Inc. All rights reserved. 

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The QRS QSU-BRIEF is a self-report instrument used to assess the severity of craving to smoke.The QSU-Brief Form is intended to represent the two factors contained in the longer, 32-item QSU (Tiffany & Drobes, 1991). This brief form contains 10 items, each rated on a 100-point scale in increments of 10 ranging from 0 = "Strongly Disagree" to 100 = "Strongly Agree". Factor 1 , which is represented by the average score of items 1, 3, 6, 7, and 10, and denotes a strong desire and inclination to smoke where smoking is perceived as rewarding for active smokers, . Factor 2 is represented by the average score of items 14, 3, 6, 78, and 9, and 10. Factor 2, which denotes the anticipation of relief from the negative effects of smoking and the urgent desire to smoke, is represented by the average score of items 4, 8, and 9 . The General Factor Scale presents a total urges score and is represented by the overall average score derived from all 10 items.

1. The original scores include a numeric rating (0-100) in increments of 10, and a definition of what the ratings represent at the scale anchors (e.g., 0 = "Strongly Disagree" and 100 = "Strongly Agree"). For the QRS QSU-BRIEF, QSORRES is populated with the text description while the numeric rating is represented in the standardized character and numeric result variables QSSTRESC and QSSTRESN. 

2. Numeric rating scales used within a questionnaire with a range of text and numeric values are indicated in the SUPPQS domain with:

   QNAM="QSANTXLO"     QNAM="QSANTXHI"

   QNAM="QSANVLLO"     QNAM="QSANVLHI"
   By storing this information in SUPPQS, it is available for interpretation purposes.
   The low and high anchor text is stored in QSORRES with the low and high numeric values stored in QSSTRESC and QSSTRESN.  All other numeric values are stored in QSORRES, QSSTRESC and QSSTRESN.
3. The time period of evaluation for the QRS QSU-BRIEF is populated in the QSEVINTX field as an evaluation interval text value, since it cannot be precisely described as an ISO 8601 duration. The evaluation interval for the QRS QSU-BRIEF is "DURING QUESTIONNAIRE COMPLETION" (QSEVINTX = "DURING QUESTIONNAIRE COMPLETION").
4. Records are created in qs.xpt for every instrument item: 

   1. For items with no data, QSORRES, QSSTRESC, and QSSTRESN are all missing and QSSTAT = "NOT DONE". If the reason is known then that reason is represented in QSREASND (e.g., QSREASND = "PREFER NOT TO ANSWER"). If the reason is unknown, then QSSTAT = "NOT DONE" and QSREASND is missing.

   2. Due to the variability of copyright holder and public domain derived subscore and overall score generation processes, records are not included for derived subscores or overall scores that are not provided.

5. The QRS QSU-BRIEF instrument includes an overall score and two subscoresthat are considered as captured data on the instrument and is not considered as derived in the example below. These scores may be submitted in SDTM or derived in the Analysis Data Model (ADaM) per scoring instructions from Stephen T Tiffany.

   1. Subscores and overall scores are represented in--ORRES, --STRESC, and --STRESN.
   2. If subscores or overall scores are received or derived by the sponsor, it is recommended that they are submitted to SDTM and verified in ADaM whenever feasible. It is the sponsors repsonsibility to do this verification based on the instrument's user manual or instructions from the copyright owner.

6. Terminology

   1. QSCAT, QSTESTCD, QSTEST, QSORRES, QSSTRESC, and QSSTRESN values are included in CDISC Controlled Terminology.

   2. A full list of value sets for the qualifier, timing, result, and unit fields is provided in Section 4, SDTM Mapping Strategy. (Note: Only the result field is always used. Include qualifier, timing, and unit fields as needed and remove this note.)

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5 Supplemental Qualifier Name Codes

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