Thitisakulchai, Poungkaew, Arunotai Siriussawakul, Sunit Jarungjitaree, Nipaporn Sangarunakul, and Piyapat Dajpratham. 2025. “Predicting Functional Decline in Geriatric Abdominal Surgery Patients: Unveiling Incidence, Risk Factors, and Innovative Predictive Models in Thailand”. Siriraj Medical Journal 77 (6):392-402. https://doi.org/10.33192/smj.v77i6.272262.