Porthao, Witthawat, Inthira Roopsawang, and Suparb Aree-Ue. “Prevalence of Frailty and Its Association with Health Conditions among Community-Dwelling Older Adults with Knee Osteoarthritis”. Journal of Thailand Nursing and Midwifery Council 39, no. 04 (October 15, 2024): 519–535. accessed April 13, 2025. https://he02.tci-thaijo.org/index.php/TJONC/article/view/269057.