Interpreting Risk

In this 17-minute video, Prof Michael Harris and Alina Zagorulko & Andriy Ivchenko, GP Specialist Trainees, discuss how to interpret risk and present the effectiveness of a treatment. It includes discussion of absolute risk (AR), absolute risk reduction (ARR), relative risk (RR), relative risk reduction (RRR), Cates plot, number needed to treat (NNT), number needed to harm (NNH) and hazard ratio (HR).

Paper used: A randomized clinical trial to evaluate the preventive effect of cranberry juice (UR65) for patients with recurrent urinary tract infection Takahashi S et al.  

Link to paper: https://pubmed.ncbi.nlm.nih.gov/22961...