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### Problem Statement
On some databases, profiling DQD for a single cohort may be slower than profiling the entire dataset. For example, on our Databricks instance, it takes longer to profile a sing…
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Until now, XGB seems the most credible tabular model algorithm.
Also, histogram-based XGboost is a CPU-trainable model algorithm.
And also, when we validate the model in other CDM databases, XGboo…
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The [visit detail](https://github.com/OHDSI/CommonDataModel/wiki/VISIT_DETAIL) table has some columns:
* `admitting_source_concept_id`
* `admitting_source_value`
* `discharge_to_concept_id`
* `d…
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Expected behavior: Ability to download all the concepts from a domain, class, and/or other narrowing feature
Actual behavior: The "Download results" button is greyed out and won't allow download o…
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We do not currently have a clear roadmap or contribution guide for the project. We should aim to have one and make this known to the OHDSI community ahead of our next planned release.
Currently, t…
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Type | Notes
------------ | -------------
Item | Trial Enrollment information in OBSERVATION table
Forum Post | http://forums.ohdsi.org/t/omop-cdm-and-clinical-trials/2109
SOLUTION
To repres…
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Is it possible to preserve the unmapped and missing/invalid source values when converting from source tables to the CDM tables?
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## WIKI-OHDSI相关的科研项目 OHDSI Research Studies
OHDSI最终是要从观察性研究中得到高质量的临床证据，自然是要通过科研课题来实现。
### 正在进行中的科研项目
- [Treatment Pathways in Chronic Disease](http://www.ohdsi.org/web/wiki/doku.php?id=research:treat…
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**Issue Name:** Multiple Death Records Due to Death_type_concept or Cause_concept Version 5.4
**Issue Type:** Duplicate records caused by multiple standard concept_ids for death cause or death typ…