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

1 Introduction

This document describes the CDISC implementation of the Chronic Respiratory Questionnaire - Self-Administered Standardized Format Follow-up Administration Version instrument.

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The CDISC Intellectual Property Policy can be found on the CDISC website at: https://www.cdisc.org/about/bylaws.

1.1 Representations and Warranties, Limitations of Liability, and Disclaimers

This document is a supplement to the SDTMIG for Human Clinical Trials and is covered under Appendix F of that document, which describes representations, warranties, limitations of liability, and disclaimers. Please see Appendix F of the SDTMIG for a complete version of this material.

CDISC specifies how to structure the data that has been collected in a database, not what should be collected or how to conduct clinical assessments or protocols. CDISC disclaims any liability for your use of this material.Although the United States Food and Drug Administration (US FDA) has provided input with regard to this supplement, this input does not constitute US FDA endorsement of any particular instrumentor protocols. CDISC disclaims any liability for your use of this material.

2 Copyright Status

McMaster University owns the copyright for the CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION instrument and has granted CDISC permission to include this supplement in the CDISC inventory of QRS data standards supplements. McMaster University will distribute the CDISC supplement package to sponsors when they are approved to use this instrument.) Hence, CDISC developed QSTESTCD and QSTEST for each item based on the actual text on the instrument.

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• The Chronic Respiratory Questionnaire Self-Administered including the standardized Dyspnea Domain (CRQSAS), Principal authors G.H. Guyatt and Dr. H.J. Schunemann
• http://milo.mcmaster.ca/questionnaires/questionnaires
• http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2845220/

3 The QS Domain Model

3.1 Assumptions for the QS Domain Model

All assumptions and business rules described in the SDTMIG QS domain are applicable to this supplement. Additional assumptions specific to the CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION are listed below.

The CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION is a multiple-choice instrument that clinicians may use to measure health-related quality of life (HRQL) in patients with chronic respiratory diseases.  It consists of 20 items with each item graded on a 7-point or 8-point Likert scale.

1. The scale points include a numeric rating (1-7) and a definition of what is represented by the rating (e.g., 1 = "All of the time"). For the CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION, QSORRES is populated with the text description while the numeric rating is represented in the standardized character and numeric result variables QSSTRESC and QSSTRESN.
          a.  The first 5 questions have a questionnaire choice of “8 = Not Done”. The result of “8” is included in QSSTRESC and QSSTRESN; however, users need to follow the scoring Solution in their approved copyright permission.

2. The time period of evaluation for theCRQ-SAS FOLLOW-UP ADMINISTRATION VERSION is populated in the QSEVLINTfield in ISO 8601 format when the evaluation interval can be precisely described as duration. The evaluation interval for the CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION is the LAST 2 WEEKS (QSEVLINT = "-P2W").

3. Records Records are created in qs.xpt for  for every collected item on the the instrument: 

   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 score generation processes, records are not included for derived subscores or total scores that are not provided.

4. 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 result fields is provided in Section 4, SDTM Mapping Strategy.

3.2 Example for the CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION QS Domain Model

The CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION example below shows the terminology used to implement the instrument in the QS domain. This example shows the data for 1 subject collected at visit 3 and visit 4 for the CRQ-SAS FOLLOW-UP ADMINISTRATION VERSION instrument. The example uses CDISC Controlled Terminology for QSTESTCD, QSTEST, and QSCAT. All original results, matching the CRF item response text, are represented in QSORRES. This result is then represented as a standard numeric score in QSSTRESN and as a standard character representation in QSSTRESC.

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4 SDTM Mapping Strategy

This section is used for reference regarding the CRF data capture and to understand the alignment of the instrument to the SDTM QS domain. It also provides guidance on how the result variables (QSORRES, QSSTRESC, and QSSTRESN) should be populated.

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