We’ve introduced the ability to download completed data extractions and quality assessments (Risk of bias) when using Extraction 1 in a format that can be uploaded into RevMan Web. When you’ve successfully completed this process, all the data you collected in your Covidence review will be added to your RevMan Web review, and you’ll be ready to proceed with setting up your analyses.
Before you get started
Make sure that:
- You’ve completed the consensus form in all of your included studies
- Your included studies all have study IDs (get in contact with support if any are blank!)
You can only upload the files into RevMan Web if you have the “study-centric data” advanced feature enabled on your review in RevMan Web. For non-Cochrane reviews and new Cochrane reviews this will be enabled by default; for existing Cochrane reviews authors can change the review settings.
You can also use the practice review in RevMan Web to test this feature and the import. For more information about study-centric data read this Cochrane knowledge base article.
What does the process of importing data look like?
- Import the Cochrane RevMan .ris file to add included studies to RevMan
- 4 CSV files will be created from Covidence
- Study information
- Study arms
- Study results
- Risk of bias (RoB)
- Then you’ll need to map data exported from Covidence to what you’ve defined in RevMan by following these steps
- Import 4 CSV files to RevMan (If you are not using Covidence for RoB, you will omit this file and import the 3 CSV files containing study data only)
- All new studies in the CSV files will be created as included studies in RevMan with characteristics, results and risk of bias data.
- Any studies which are already in RevMan will have their characteristics, results and risk of bias data updated. Note: any results which have been removed in the CSVs won’t be removed if they already exist in RevMan.
- You can then create relevant analyses by pulling in all the data stored against your included studies.
What are the benefits?
- Downloading your data into CSVs before uploading it into RevMan will give you an opportunity to tidy up, edit and remove any data you don’t require in RevMan.
- Defining your PICO in RevMan allows you to think more systematically about how to structure your analysis before importing your data.
- This process supports updates
- Even if you’re not loading your data into RevMan, you might benefit from the CSV outputs provided.
What is not currently supported?
- You can’t download RoB2 data from Covidence
- Through the CSV upload, reference information about studies aren’t uploaded. If you want to upload this data you can upload a RIS file before importing.
- If you want to subgroup by a property in an included study, Covidence doesn’t automatically populate this into the CSV’s but you can add them in before you import (see step 5 in this article)
- If you want to create subgroups within studies e.g. subgroup of participants, property of the intervention groups, variants of the outcome you can’t use the study-centric analyses but you can use custom input analysis. For more information read this Cochrane knowledge base article.
1. How are results imported into RevMan Web?
After you’ve imported your results, they will be added to included studies in the “Result data” page. You can create analyses that pull the data from the included studies.
2. How are timepoints handled if I’ve added them into Covidence?
If you’ve added timepoints into Covidence then we will create a new outcome for each timepoint by adding the time point to the outcome name (an example is shown below). If you want to create an analysis for each timepoint, a new outcome will need to be added into RevMan Web for each timepoint.
3. Why am I getting the “File contains inconsistent data” message in RevMan Web?
If you haven’t added intervention and outcomes into RevMan Web exactly how they appear in the CSVs then you will get this message. See steps 3 and 4 in the step by step guide on how to do this. If you have already done this, then:
- Double check that there are no extra spaces in the CSV or in RevMan Web, as they need to match exactly.
Also check if there are any formatting differences, for example upper case vs lower case characters.
4. Why am I getting the "We are having trouble saving your changes" message although there is no errors in my import?
If no errors are found when importing the CSVs, but the import fails then it could be that there are special characters e.g. ()#/ in your CSV that can't be processed by RevMan Web. We recommend that you contact RevMan Web support as they will be able to determine if it is a special character issue and what characters need to be removed for the CSV import to work. You'll know it's this issue because when you click "Report this problem you'll see this message "Unicode:xxx".