I’m currently working on a post-marketing surveillance research project for the HPV vaccine. While analyzing the data in ATLAS, I encountered an issue with the **incidence rate
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**, which consistently shows “N/A.”
I’ve double-checked my cohort definitions, concept sets, and incidence rate settings, and I’ve taken screenshots of each. I’m confident that the data includes relevant cases—specifically, I identified 34 patients who experienced hypertension (HTN) before and after the vaccine, and 2 patients who developed HTN after the index date.
Could you please advise on what might be causing the N/A issue or suggest possible troubleshooting steps?
Thank you in advance for your support.
