• Van Minh Hoang, Juhwan Oh, Bao Ngoc Nguyen, Le Minh Dat, Jong-Koo Lee, TranThi Giang HuongTGHhttps://orcid.org/0000-0003-3477-3493Department of International Cooperation, Ministry of Health, Hanoi, Vietnam.Department of Global Health, Hanoi Medical University, Hanoi, Vietnam., Van Huy Nguyen, Seung-Pyo Lee, Kyung-Sook Bang, Youngtae Cho, Sun-Young Kim, Hwa-Young Lee, Quang Cuong Le, Narshil Choi, Thai Son Dinh, and Ngoc Hoat Luu.
• Center for Population Health Sciences, Hanoi University of Public Health, Hanoi, Vietnam.
• J. Korean Med. Sci. 2019 Feb 4; 34 (5): e42.

BackgroundIn order to provide essential scientific evidence on the population's health status and social health determinants as well as the current capacity of the health care system in Vietnam to health policy makers and managers, Vietnam Ministry of Health, Hanoi University of Public Health, Hanoi Medical University, and Ho Chi Minh University of Medicine and Pharmacy collaborated with Seoul National University (Korea) and conducted a health system survey in the Quoc Oai district (of Hanoi capital) that represented northern rural Vietnam.MethodsThe study design was a cross-sectional study. The survey covered different topics (more than 200 questions) and was administered in three separate questionnaires: 1) Basic information of all household members; 2) Household characteristics; and 3) Individual characteristics. Socio-demographic characteristics among the households and individuals were collected from 2,400 households sampled by multi-stage cluster sampling method: more than 200 questions.ResultsThe household size of Quoc Oai was larger than the national average and there was no significant difference in gender composition. In addition, the proportions of pre-elderly, age 55-64, and elderly group (65 years old and over) were higher than the national population statistics. In this context, demographic transition has begun in Quoc Oai.ConclusionThis study design description provides the basic information about a baseline survey of a future prospective cohort (as a part of a collaborative project on strengthening the health system in Vietnam) to the prospective data user of this survey.

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