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. 2020 Oct 1;10(10):e038763. doi: 10.1136/bmjopen-2020-038763

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Multilevel mixed-effects logistic regression analysis of PCU in CHNS 2004–2015. P<0.05. Male gender, low education level, low urbanisation, married, low per capita income, no medical insurance, no smoking, no drinking and no disease history were treated as reference categories, respectively. Non-marital status (including divorced, widowed, separated and never married). OR among various factors of PCU in (A) 2004, (B) 2006, (C) 2009, (D) 2011 and (E) 2015. CHNS, China Health and Nutrition Survey; PCU, preventive care utilisation.