EpiVisuals Pack 4: Risk Measures & Effect Estimates – 6 Digital Study Cards

Stop Guessing. Start Calculating with Confidence.

Do you struggle to explain the difference between a Risk Ratio and an Odds Ratio? Are Hazard Ratios still a mystery? EpiVisuals Pack 4 is your ultimate visual toolkit for mastering the math of epidemiology. Created by Dr. Oussama Wail Bouhentala, these cards transform dense statistical formulas into intuitive, "pin-ready" visual guides.

What’s Inside the Pack?

This digital download features 6 high-resolution A4 study cards:

1. Risk Ratio (RR): The primary measure for cohorts and RCTs, including the $2\times2$ table and the interpretation scale.
2. Odds Ratio (OR): Master the measure of case-control studies and understand logistic regression outputs.
3. ARR, RRR & NNT: Clinical impact measures (Absolute Risk Reduction & Number Needed to Treat) with a visual bar comparison.
4. Hazard Ratio (HR) & IRR: Time-to-event and person-time measures explained through Kaplan-Meier curves and regression logic.
5. The OR-RR Rule: A critical decision guide on when the Odds Ratio approximates Risk and the "Rare Disease Assumption."
6. Master Formula & CI Guide: A consolidated reference sheet for all measures, plus a visual guide to interpreting Confidence Intervals and Forest Plots.

Why Choose EpiVisuals?

• Visual Decision Tools: A built-in flowchart helps you choose the right measure based on your study design.
• Clinical Relevance: Focuses not just on statistical significance, but on clinical impact (NNT/ARR).
• Exam-Ready: Perfect for MPH students, USMLE preparation, and researchers writing scientific manuscripts.
• Crystal Clear Logic: Learn the "Rule of Thumb" for interpreting $1.0$ (null) and confidence interval widths at a glance.

Format: High-resolution PDF | A4 Full Color | Print-ready (300 DPI).