EBM Calculator
Support
▶ Frequently Asked Questions
▶ What devices are compatible?
EBM Calculator is available on iOS devices running iOS 18.1 or later. It is optimized for iPhones, but will also run on iPads and Apple Silicon Macs.
▶ How many results can I save?
You can save up to 50 results.
From the Results tab, you can also reorder results (press and drag), delete individual results (swipe left), share results (swipe right), or delete all saved results (from the menu button).
From the Results tab, you can also reorder results (press and drag), delete individual results (swipe left), share results (swipe right), or delete all saved results (from the menu button).
▶ Why do the calculators have different input options?
Different input methods are available to fit various ways authors report their results. Choose the one that makes the most sense for the study you are appraising.
For example, if you are assessing the performance of a Diagnostic Test and the authors report only the Predictive Values (and not sensitivity or specificity), choose PPV/NPV for your input fields.
For example, if you are assessing the performance of a Diagnostic Test and the authors report only the Predictive Values (and not sensitivity or specificity), choose PPV/NPV for your input fields.
▶ What formulas are used for calculating confidence intervals?
Click here to review the formulas used for calculating all metrics and confidence intervals in the app.
▶ Why did you create this app?
I was frustrated by constantly having to switch between various websites to find online calculators for interpreting study results. I built the EBM Calculator app to streamline this process and to simplify evidence appraisal.
My first version was coded in Python for use on my laptop. I decided to make it an official iOS app to share it easily with colleagues who were also evaluating the medical literature!
It’s come a long way since I started, but it’s still a purposefully simple app: input data from a study to see the strength of association (for studies on a new therapy or exposure), the performance of a diagnostic test, or to calculate the post-test probability.
My first version was coded in Python for use on my laptop. I decided to make it an official iOS app to share it easily with colleagues who were also evaluating the medical literature!
It’s come a long way since I started, but it’s still a purposefully simple app: input data from a study to see the strength of association (for studies on a new therapy or exposure), the performance of a diagnostic test, or to calculate the post-test probability.
▶ Are you planning to add more features?
Yes! The more I learn, the more features I want to build into the app. But I also wanted to get it out there ASAP to start helping clinicians.
If you have a suggestion of what would be helpful, please let me know at support@ebmcalculator.com!
If you have a suggestion of what would be helpful, please let me know at support@ebmcalculator.com!
▶ How-To Guide
This section will include walkthroughs of how to use the calculator for different scenarios. Stay tuned!
▶ Versions
▶ v1.3.0
- All new UI with navigation bar and cleaner appearance
- Swipe on results to Share, Edit, Save, or Delete
- Drag and drop results to rearrange in Results section
- Calculate Post-Test Probability from any diagnostic test result
- New Library section with various Lessons in EBM
- Add Interactive Fagan Nomogram
- Debug and refine UI
▶ v1.2.0
- Add feature to save, delete, and share results
- Add formula pages
- Update icons and logos
- Debug and refine UI
▶ v1.1.0
- Add icons and logos
- Debug and refine UI
▶ v1.0.0
- Effect Calculator
- Diagnostic Test Calculator
- Post-Test Probability Calculator
© 2024 David A. Stewart, MD