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Questionnaires, ratings, and scales (QRS) are standardized and often validated instruments. Given this, implementation of collection, tabulation, and analysis standards per this guide is specialized to maintain standardization inherent to instruments and, when applicable, the validity of validated instruments. General guidance for standardized use of controlled terminology and formats is provided in this section with detailed instructions provided as part of sections specific to collection, tabulation, and analysis standards.

CDISC provides descriptions for different types of QRS instruments and develops and publishes supplemental guidance for individual QRS instruments when the instrument is in the public domain or when permission has been granted by the copyright holder. CDISC QRS Supplements are maintained as stand-alone guides on the CDISC website at https://www.cdisc.org/foundational/qrs.

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