740 lines
22 KiB
HTML
740 lines
22 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta name="generator" content="pandoc" />
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<meta http-equiv="X-UA-Compatible" content="IE=EDGE" />
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<title> How to Request Changes to the CDM</title>
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<script src="site_libs/header-attrs-2.25/header-attrs.js"></script>
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<script src="site_libs/jquery-3.6.0/jquery-3.6.0.min.js"></script>
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<script src="site_libs/bootstrap-3.3.5/js/bootstrap.min.js"></script>
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code{white-space: pre-wrap;}
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<link rel="stylesheet" href="style.css" type="text/css" />
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<style type = "text/css">
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<style type="text/css">
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<style type="text/css">
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#TOC {
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margin: 25px 0px 20px 0px;
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@media (max-width: 768px) {
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padding-left: 30px;
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padding-right: 40px;
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div.main-container {
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max-width: 1200px;
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}
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div.tocify {
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width: 20%;
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max-width: 260px;
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max-height: 85%;
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@media (min-width: 768px) and (max-width: 991px) {
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div.tocify {
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</style>
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</head>
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<body>
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<div class="container-fluid main-container">
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<!-- setup 3col/9col grid for toc_float and main content -->
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<div class="row">
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<div class="col-xs-12 col-sm-4 col-md-3">
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<div id="TOC" class="tocify">
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</div>
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</div>
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<div class="toc-content col-xs-12 col-sm-8 col-md-9">
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<div class="navbar navbar-default navbar-fixed-top" role="navigation">
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<div class="container">
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<div class="navbar-header">
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<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-bs-toggle="collapse" data-target="#navbar" data-bs-target="#navbar">
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<span class="icon-bar"></span>
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<span class="icon-bar"></span>
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<span class="icon-bar"></span>
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</button>
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<a class="navbar-brand" href="index.html"><div><img src="ohdsi16x16.png"></img> OMOP Common Data Model </div></a>
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</div>
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<div id="navbar" class="navbar-collapse collapse">
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<ul class="nav navbar-nav">
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<li>
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<a href="index.html">
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<span class="fa fa-house"></span>
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</a>
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</li>
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<li class="dropdown">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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<span class="fa fa-landmark"></span>
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Background
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<span class="caret"></span>
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</a>
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<ul class="dropdown-menu" role="menu">
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<li>
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<a href="background.html">Model Background</a>
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</li>
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<li>
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<a href="cdmRefreshProcess.html">CDM Refresh Process</a>
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</li>
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<li>
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<a href="vocabulary.html">How the Vocabulary is Built</a>
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</li>
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</ul>
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</li>
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<li class="dropdown">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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<span class="fa fa-list-alt"></span>
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Conventions
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<span class="caret"></span>
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</a>
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<ul class="dropdown-menu" role="menu">
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<li>
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<a href="dataModelConventions.html">General Conventions</a>
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</li>
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<li>
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<a href="ehrObsPeriods.html">Observation Periods for EHR Data</a>
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</li>
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<li>
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<a href="cdmPrivacy.html">Patient Privacy and OMOP</a>
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</li>
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</ul>
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</li>
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<li class="dropdown">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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<span class="fa fa-history"></span>
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CDM Versions
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<span class="caret"></span>
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</a>
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<ul class="dropdown-menu" role="menu">
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<li>
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<a href="cdm30.html">CDM v3.0</a>
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</li>
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<li>
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<a href="cdm53.html">CDM v5.3</a>
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</li>
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<li class="dropdown-submenu">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">CDM v5.4</a>
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<ul class="dropdown-menu" role="menu">
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<li>
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<a href="cdm54.html">CDM v5.4</a>
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</li>
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<li>
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<a href="cdm54Changes.html">Changes from CDM v5.3</a>
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</li>
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<li>
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<a href="cdm54erd.html">Entity Relationships</a>
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</li>
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<li>
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<a href="cdm54ToolingSupport.html">Detailed tooling support per CDM field</a>
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</li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="dropdown">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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<span class="fa fa-plus-square"></span>
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CDM Proposals
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<span class="caret"></span>
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</a>
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<ul class="dropdown-menu" role="menu">
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<li>
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<a href="cdmRequestProcess.html">How to Propose Changes to the CDM</a>
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</li>
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<li>
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<a href="https://github.com/OHDSI/CommonDataModel/issues?q=is%3Aopen+is%3Aissue+label%3AProposal">Under Review</a>
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</li>
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<li class="dropdown-submenu">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">Accepted</a>
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<ul class="dropdown-menu" role="menu">
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<li>
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<a href="https://github.com/OHDSI/CommonDataModel/issues/252">Region_concept_id</a>
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</li>
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</ul>
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</li>
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||
</ul>
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</li>
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<li class="dropdown">
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<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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<span class="fa fa-question"></span>
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How to
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<span class="caret"></span>
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||
</a>
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||
<ul class="dropdown-menu" role="menu">
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||
<li>
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||
<a href="download.html">Download the DDL</a>
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||
</li>
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||
<li>
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||
<a href="cdmRPackage.html">Use the CDM R Package</a>
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</li>
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||
<li>
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||
<a href="drug_dose.html">Calculate Drug Dose</a>
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||
</li>
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||
</ul>
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||
</li>
|
||
<li class="dropdown">
|
||
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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||
<span class="fa fa-life-ring"></span>
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||
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||
Support
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||
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||
<span class="caret"></span>
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||
</a>
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<ul class="dropdown-menu" role="menu">
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||
<li>
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||
<a href="cdmDecisionTree.html">Help! My Data Doesn't Fit!</a>
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</li>
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||
<li>
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||
<a href="faq.html">FAQ</a>
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||
</li>
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||
<li>
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||
<a href="sqlScripts.html">SQL Scripts</a>
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||
</li>
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||
<li>
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||
<a href="contribute.html">Ask a Question</a>
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||
</li>
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||
</ul>
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||
</li>
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||
</ul>
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<ul class="nav navbar-nav navbar-right">
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||
<li>
|
||
<a href="https://github.com/OHDSI/CommonDataModel">
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||
<span class="fa fa-github"></span>
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||
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||
</a>
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</li>
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</ul>
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</div><!--/.nav-collapse -->
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</div><!--/.container -->
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</div><!--/.navbar -->
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<div id="header">
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<h1 class="title toc-ignore"><img src="ohdsi40x40.png"></img> How to
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Request Changes to the CDM</h1>
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</div>
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<p>Are you in the right place? Please answer the questions in the <a
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href="cdmDecisionTree.html">decision tree</a> prior to beginning a CDM
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Request to make sure you aren’t missing something.</p>
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<p>As OHDSI is an open-source community working towards developing a
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Common Data Model that fulfills the needs of its users, it is often the
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case that changes need to be made to the model as the community and its
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research continues to mature. However, the number of people,
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institutions, and initiatives that rely on the OMOP CDM to advance the
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science of observational health has grown dramatically since its
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inception in 2015. Therefore, care must be taken when considering any
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update to the model, big or small. This document outlines the process
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that should be taken to ratify a change to the CDM.</p>
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<p><strong>If you would like guidance prior to starting this process,
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consider contacting us on our <a
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href="https://github.com/OHDSI/CommonDataModel">GitHub</a> or <a
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||
href="https://teams.microsoft.com/l/team/19%3a133f2b94b86a41a884d4a4d160610148%40thread.tacv2/conversations?groupId=a6f2c516-e568-4974-8f1e-a7bdc2f997c5&tenantId=a30f0094-9120-4aab-ba4c-e5509023b2d5">Teams
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||
Channel</a>.</strong></p>
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<div id="scope" class="section level3">
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<h3>Scope</h3>
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<ul>
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<li>What kind of changes?
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<ul>
|
||
<li>Minor, e.g. new field in existing table</li>
|
||
<li>Major, e.g. breaking changes, additional tables</li>
|
||
</ul></li>
|
||
<li>Who can propose changes?
|
||
<ul>
|
||
<li>Individuals, OHDSI working groups, organizations</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
<div id="step-1-proposal" class="section level2">
|
||
<h2>Step 1: Proposal</h2>
|
||
<p>Once a group or organization has decided on the update they would
|
||
like made to the model, they must produce a document including the
|
||
following:</p>
|
||
<ol style="list-style-type: decimal">
|
||
<li>A clear description of the change or addition including the User
|
||
Guide and ETL Conventions in the same structure as what is present on
|
||
the website for every table and field currently in the CDM.</li>
|
||
<li>A clearly defined use case noting why the latest version of the OMOP
|
||
CDM fails to adequately address said use case. This should include
|
||
describing what you have already tried with the latest version of the
|
||
OMOP CDM and why it does not meet your needs.</li>
|
||
<li>An example of how the requested change or addition will be used in
|
||
practice. This can be in the form of sample data, SQL code, a diagram,
|
||
or text. The proposal can optionally include suggestions as to how other
|
||
OHDSI tools (Achilles, DataQualityDashboard, Atlas, etc.) should work
|
||
with your change or addition.</li>
|
||
</ol>
|
||
<p>Once the document is ready to submit, please email <a
|
||
href="mailto:a58abde7.ohdsi.org@amer.teams.ms">CDM Proposals - Workgroup
|
||
- Common Data Model</a>. This will go directly to a separate channel in
|
||
the OHDSI Teams environment that is available to all members of the CDM
|
||
Working Group. After submitting your document with your proposal to
|
||
email listed above, someone in the OMOP CDM Working Group will respond
|
||
to you within 2 weeks. The potential outcomes are as follows:</p>
|
||
<ul>
|
||
<li>Proposal merits further review (move on to next steps)</li>
|
||
<li>Proposal is not ready for workgroup review due to one or more
|
||
factors
|
||
<ul>
|
||
<li>Incomplete</li>
|
||
<li>Insufficiently aligned with the OMOP framework</li>
|
||
<li>Poorly described use case</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
<div id="step-2-initial-presentation" class="section level2">
|
||
<h2>Step 2: Initial Presentation</h2>
|
||
<p>Should your proposals merit further review, the OMOP CDM Working
|
||
Group will reach out to you to schedule a time for you to present your
|
||
case at an upcoming meeting. You will be given 15-30 minutes to present
|
||
your document and you can include anything you feel will help illustrate
|
||
the need and your potential solution. The group will then discuss, ask
|
||
questions, and potentially offer other solutions. Depending on the
|
||
nature of the request, this may go over multiple sessions and you may be
|
||
asked to make changes to your initial design. At the end of this process
|
||
your proposal will then be put to consensus in the CDM WG. If the group
|
||
decides no, they will give feedback describing why they did not feel
|
||
your proposal should be accepted at this time. If the group decides yes,
|
||
you move on to step 3.</p>
|
||
<p><strong>Potential Decision Criteria:</strong></p>
|
||
<ul>
|
||
<li>If the change is foundational to OHDSI tools, then the proposal will
|
||
be put to the larger community open to public comment</li>
|
||
<li>How generalizable is your change? Can it be readily applied to other
|
||
use cases?</li>
|
||
<li>Are the proposed changes/additions well designed from a modeling
|
||
perspective? Do they follow the existing OMOP CDM conventions?</li>
|
||
<li>What are the consequences of the change? Are they potentially
|
||
breaking changes or are they just changes to existing conventions? Will
|
||
they require the remapping of existing OMOP datasources?</li>
|
||
<li>How complicated is your change? Is it an addition of a field or
|
||
multiple tables?</li>
|
||
</ul>
|
||
</div>
|
||
<div id="step-3-preliminary-decision" class="section level2">
|
||
<h2>Step 3: Preliminary Decision</h2>
|
||
<p>If the proposal is accepted in the preliminary decision, then a
|
||
branch will be created in the CommonDataModel repository, based on the
|
||
latest version of the OMOP CDM in use (currently v5.4). It will then be
|
||
your responsibility to apply the change programmatically in this branch.
|
||
This should include:</p>
|
||
<ul>
|
||
<li>Updating the CSV file with the CDM specification, including the User
|
||
Guide and ETL Conventions documentation</li>
|
||
<li>Generating the DDL files with the change</li>
|
||
<li>Testing the new DDL files in at least one supported environment</li>
|
||
</ul>
|
||
<p>Once the DDLs with the proposed change are created and tested, you
|
||
should then ETL some data (either real or synthetic) into the new
|
||
table/fields. Then, an example cohort should be created that utilizes
|
||
the change or addition and clearly displays how it can be used in a real
|
||
study. It is expected that during this stage the proposal will change as
|
||
you work through your idea in a tangible environment.</p>
|
||
<p><strong>Potential Decision Criteria:</strong></p>
|
||
<ul>
|
||
<li>How would you evaluate the quality of this new field/table?</li>
|
||
<li>What characterizations would you perform?</li>
|
||
<li>How would you perform a study using this new feature?</li>
|
||
</ul>
|
||
<p><strong>Potential Outcomes:</strong></p>
|
||
<ul>
|
||
<li>Proposal demonstrates merit for further consideration as:
|
||
<ul>
|
||
<li>a core data model change (move on to next steps)</li>
|
||
<li>an extension (how do we deal with these/do we have ownership of
|
||
them?)</li>
|
||
</ul></li>
|
||
<li>Proposal does not demonstrate merit for further consideration at
|
||
this time, and:
|
||
<ul>
|
||
<li>recommend as a LOCAL extension</li>
|
||
<li>recommend a different course</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
<div id="step-4-final-presentation" class="section level2">
|
||
<h2>Step 4: Final Presentation</h2>
|
||
<p>After generating, testing, and implementing your proposal in a
|
||
real-world environment the CDM working group will invite you again to
|
||
present your findings in another 15-30 minute presentation. This should
|
||
include learnings from the exercise and any updates made to the initial
|
||
proposal.</p>
|
||
</div>
|
||
<div id="step-5-final-decision" class="section level2">
|
||
<h2>Step 5: Final Decision</h2>
|
||
<p>At this point, the working group liaisons will also take the proposal
|
||
to other groups to elicit feedback. Then the CDM working group will vote
|
||
and give a final decision on the proposed change. If ratified, the
|
||
branch in the repository will be merged into the develop branch to be
|
||
included in a next version of the OMOP Common Data Model.</p>
|
||
<p>The change should initiate requests for features in tools. The end of
|
||
this process should be a trigger for using the new feature as per the
|
||
use case. The group should also produce at least one query for the query
|
||
library on how to work with the new addition/change.</p>
|
||
<div id="resources" class="section level3">
|
||
<h3>Resources</h3>
|
||
<p>“Implementing & adopting a customized OMOP Common Data Model”
|
||
(Melany Philofsky, OHDSI Symposium 2021) <a
|
||
href="https://www.ohdsi.org/2021-global-symposium-showcase-18/"
|
||
class="uri">https://www.ohdsi.org/2021-global-symposium-showcase-18/</a></p>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
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|
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|
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