From The Guardian
1. What is the study design?
2. What is the exposure? The primary outcome?
3. The researchers found evidence of effect modification. What was it?
4. The researchers hypothesized potential mediators. What were these?
5. The researchers only considered 21 different kinds of surgery, rather than kinds of surgery. Why?
When a female surgeon operates, patient outcomes are generally better,
particularly for women, even after adjusting for differences in chronic
health status, age and other factors, when undergoing the same
procedures.
6. Explain exactly why it was necessary to adjust for chronic health status.