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    Original site: www.cdc.gov/nssp/php/free-textcodinginnsspessence/index.html | RestoredCDC.org is an independent project, not affiliated with CDC or any federal entity. Visit CDC.gov for free official information. Due to archival on January 6, 2025, recent outbreak data is unavailable. Videos are not restored. Access data.restoredcdc.org for restored data. Use of this site implies acceptance of this disclaimer.
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        National Syndromic Surveillance Program (NSSP)
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April 22, 2024
  Free-Text Coding in ESSENCE
          Purpose
          Syndromic surveillance depends heavily on sharing methods, and practitioners must understand the language. Free-text coding in ESSENCE, which is accessible to all users, follows distinct patterns. Learning to read these patterns allows users to take queries from many places and repurpose them to suit their unique needs. This series offers tips to empower users to customize queries to fit their level of data, ensuring accurate results.
          Table of Contents |
          Free-text Coding in NSSP–ESSENCE
          * Part 1. Wildcards
          * Part 2. Underscores_and Brackets [ ]
          * Part 3: Inclusionary Terms
          * Part 4: Exclusion Terms and Parentheses
          * Part 5: Putting Queries to the Test
          * Part 6. Wrapping Things Up
          * Part 7: ISBLANK and ISNULL
          * Additional Tips: !TERM! Syntax
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        About the author
        This series of articles is written by Senior Data Analyst Zachary Stein, who does epidemiological work to support NSSP efforts. Stein is an active participant in our NSSP Community of Practice (CoP). He initially wrote about free-text coding as an entry on the NSSP-CoP Syndrome Definition Committee forum. The forum generated considerable interest, inspiring this series. Stein acknowledges input provided by others who contributed to the forum post.
        In addition to exploring this series, you can also download the Query Development Job Aid.
          Related PagesPart 1. Wildcards
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            * Part 1. Wildcards
            * Part 2. Underscores_and Brackets [ ]
            * Part 3: Inclusionary Terms
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            * Part 4: Exclusion Terms and Parentheses
            * Part 5: Putting Queries to the Test
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        * Part 1. Wildcards
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        * Part 3: Inclusionary Terms
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        * Part 4: Exclusion Terms and Parentheses
        * Part 5: Putting Queries to the Test
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      View All National Syndromic Surveillance Program (NSSP)
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    National Syndromic Surveillance Program (NSSP)
    To improve public health, NSSP helps gather and provide syndromic data from collaborations with state and local health departments and others.
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