On November 20th 2021, Yogyakarta State University (UNY) Statistics Study Program Class of 2018, Adi Setiawan, presented a research article with his team at The International Joint Seminar, The 5th International Seminar on Innovation in Mathematics and Mathematics Education and The 7th International Seminar on Science Education organized by the Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta. Their article is entitled "Multilevel Logistics Regression Analysis on Determinants of Adult Stroke Incidence in Indonesia". In making the article, Adi collaborated with his classmates, namely Nusyrotus Sa'adah, Anisa Al Fitri, Nusaibah Az-Zuhry with the guidance of a UNY statistics lecturer, namely Mrs. Kismiantini, Ph.D.