“…In fact, COC has two core elements ( Haggerty et al, 2003 ): care of an individual patient and care over time, distinguishing it from care coordination and integration ( Rijken et al, 2018 ). Research has shown that poor COC is associated with not only higher health care costs and more hospitalizations ( Bazemore et al, 2018 ; CDKnight, Dowden, Worrall, Gadag, & Murphy, 2009 ; Chen, Yamada, Smith, & Chiu, 2011 ; Cho et al, 2015 , Cho et al, 2015 ; Chu, Chen, & Cheng, 2012 ; Hong & Kang, 2013 ; Hong, Kang, & Kim, 2010 ; Jung, Cho, Lee, & Kim, 2018 ; Kao & Wu, 2016 , 2017 ; Lin & Wu, 2017 ; Pollack, Weissman, Lemke, Hussey, & Weiner, 2013 ; Romaire, Haber, Wensky, & McCall, 2014 ), but with worse health outcomes, especially in chronic and multimorbid patients ( Cho, Kim, et al, 2015 ; Gruneir et al, 2016 ; Jang, Choy, Nam, Moon, & Park, 2018 ; Weir, McAlister, Majumdar, & Eurich, 2016 ; Ye et al, 2016 ). However, the meaning behind COC can vary depending on the used definitions ( Gulliford, Naithani, & Morgan, 2006 ; Haggerty et al, 2003 ; Saultz, 2003 ; Saultz & Albedaiwi, 2004 ; Shortell, 1976 ), COC measurement methods and data sources.…”