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Clinical Query 2 (CQ2) is a website that allows you to search the old BIDMC Clinical Data Repository (CDR) for research purposes, such as obtaining preliminary patient counts for a grant or IRB proposal. CQ2 contains two tools:
| Feature | Description |
|---|---|
| Aggregate Query Tool | After entering inclusion and exclusion criteria, CQ2 will tell you the number of matching patients in the CDR. You do not need an IRB protocol to run these aggregate count queries. For additional patient privacy, a small random number is added to the actual number of matching patients and small counts are masked. Attempts to circumvent this might result in your CQ2 account being deactivated. |
| Data Download Tool | If you have IRB approval, you can download patient level data, such as the medical record numbers (MRNs), for the patients who matched an aggregate count query that you previously ran in CQ2. By default, only Principal Investigators (PIs) of protocols approved by the BIDMC IRB can use the Data Download Tool; however, PIs can grant access to Co-Investigators (see instructions within the Data Download Tool). Please see the the section below on "Help and Support" for information on how the BIDMC InSIGHT Core can assist with accessing BIDMC clinical data. |
For questions about using CQ2, please contact Griffin Weber at gweber@bidmc.harvard.edu or Academic Computing at research@bidmc.harvard.edu.
The InSIGHT Core is a research core at BIDMC that was created to help investigators extract custom datasets from clinical systems at BIDMC. In particular, the InSIGHT Core can access data that are not in CQ2, and they can format the data in ways that are not possible through CQ2. The InSIGHT Core can also access the list of patients who matched a query you previously ran using the Aggregate Query Tool. To get started, please contact Karla Pollick from the InSIGHT Core at kpollick@bidmc.harvard.edu.
The CQ2 database contains most, but not all of the data inside the old BIDMC clinical data repository (CDR). Data are not included in CQ2 if they cannot be mapped to a standard medical coding system. This can occur due to data entry errors, missing data, the use of codes that are now obsolete, or other reasons.
The following dates indicate major updates to the Clinical Query 2 website:
| Date | Description |
|---|---|
| 06/01/2024 | The new BILH i2b2 website was released. It includes the same functionality as CQ2, but with additional data from Epic and other BILH sites. |
| 12/26/2021 | The Aggregate Query Tool was updated with new features, including an improved Find Terms tool and new charts showing demographic breakdown results. |
| 04/06/2018 | PIs with IRB approved protocols can now authorize co-investigatrs to extract patient level data from the Data Download Tool. |
| 12/31/2015 | Diagnosis and procedure codes were updated to support the switch from ICD-9 to ICD-10 that occurred on October 1, 2015. |
| 04/28/2015 | A Data Download Tool was added to CQ2 to enable investigators who have IRB approval to extract patient level data. |
| 02/10/2015 | The CQ2 home page was expanded to include release history and display the number of patients per year with each data type. New functionality includes temporal queries, demographic breakdowns on query results, and a new Workplace section to bookmark commonly used concepts or save previous queries. |
| 10/28/2014 | Vital signs were added. |
| 08/18/2013 | Visit details (emergency, inpatient, outpatient, length of stay) were added. Users can now search for concepts that were observed in the same financial encounter. |
| 10/01/2012 | CQ2 was launched. |