Episode 56 of CRAMSURG - Clinical Research Appraisal and Methodology for Surgical Trainees. The paper for discussion is A 48‐hour Symptom Threshold Predicts Perforated Appendicitis: Development of a Clinical Risk Model, WJS Aug 2025. The teaching topic is a practical guide to statistical tests - part 8: Spearman's correlation coefficient. Brought to you by CRAMSURG www.cramsurg.org.