ESA had organized longitudinal data analysis lecture – virtual 1 training for members and stakeholders during November 13 – 14, 2023 by Prof. Peter Diggle, Lancaster University, Lancaster medical school, Lancaster, UK. More than 80 members for two days total 6 hours participated the virtual training. Also ESA Executive Committee members #8, from AHRI #2 and ESS #10 for free were invited. The payment was for free to members but pay a registration fee of ETB 250.