1. World Health Organization. Ageing and health, https://www.who.int/news-room/fact-sheets/detail/ageing-and-health (2021).
2. National Statistical Office. Active Ageing Index of Thai elderly. (Statistical Forecasting Division, National Statistical Office, Ministry of Digital Economy and Society, Thailand., 2017).
3. World Health Organization. Active ageing: a policy framework. (World Health Organization, 2002).
4. World Health Organization. Global age-friendly cities: a guide, http://www.who.int/ageing/publications/Global_age_friendly_cities_Guide_English.pdf (2007).
5. Thanakwang, K., Isaramalai, S. A. & Hatthakit, U. Development and psychometric testing of the active aging scale for Thai adults. Clin. Interv. Aging 9, 1211–1221. https://doi.org/10.2147/cia.s66069 (2014).