Episode 52 of CRAMSURG - Clinical Research Appraisal and Methodology for Surgical Trainees. The paper for discussion is Meta-analysis and systematic review of long-term quality of life and recurrence following elective surgery versus non-operative management for colonic diverticulitis, Surgery Mar 2025. The teaching topic is a practical guide to statistical tests - part 4: Welch's ANOVA and two way ANOVA. Brought to you by CRAMSURG www.cramsurg.org.