We analyze national cross-sectional data of older adults 80 years and older from the Health, Aging, and Retirement in Thailand (HART) study in 2015. In a three-stage (region, province, blocks or villages) stratified random sampling in each household, one person (≥ 45 years) was randomly selected, being the inclusion criterium. For frail respondents proxy interviews were administered [32, 33]. We restricted our analytical sample to those 80 years and older (N = 927), excluding 101 proxy interviews. The study received ethical approval from the “Ethics Committee in Human Research, National Institute of Development Administration – ECNIDA (ECNIDA 2020/00012)”, and participants provided written informed consent.
Copyright and License information: The Author(s) ©2023 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
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