“…Whilst there are still relatively few studies directly applying SDT to populations with COPD (McCullough et al, 2016 ; Richardson et al, 2014 ), research has reported the ability of the theory to predict behaviours relevant to COPD self-management, albeit in non-COPD populations (Ng et al, 2012 ; Ntoumanis et al, 2020 ; Ryan, Patrick, Deci, & Williams, 2008 ); including successfully predicting physical activity participation (Brooks et al, 2018 ; Rahman, Thøgersen-Ntoumani, Thatcher, & Doust, 2011 ; Rahman, Hudson, Thøgersen-Ntoumani, & Doust, 2015 ) and smoking cessation (Williams et al, 2006 ). Multiple studies have also found that higher levels of basic need satisfaction were associated with greater well-being and perceived health (Bartholomew et al, 2011b ; Chen, Chang, Tsai, & Hou, 2018 ; Rahman et al, 2011 ; Rahman et al, 2015 ).…”