Tran, T., Huynh, D., Pham, D., Nguyen, T., Nguyen, T., Ho, D. and Nguyen, C. 2021. The investigation of the level of activities of daily living by Katz index and related factors in elderly inpatients at department of cardiology of Thong Nhat hospital. VNUHCM Journal of Health Sciences. 2, 2 (Nov. 2021), 222-228. DOI:https://doi.org/https://doi.org/10.32508/stdjhs.v2i2.478.