“…Firstly, by recruiting CVD patients the most severe cases are not captured, possibly due to death or the healthy volunteer effect (Lindsted, Fraser, Steinkohl, & Beeson, 1996), giving rise to selection bias, reverse causality, and residual confounding. Secondly, when assessing current depression after the CVD event, the results may be confounded by illness perception (Gottlieb et al, 2009;Greco et al, 2014;Steca et al, 2013), psychological functioning such as coping (Rozanski & Kubzansky, 2005), or CVD severity (Rollman et al, 2012;Suzuki et al, 2011). Alternatively, the hospital setting may make it difficult for patients to evaluate symptoms of depression such as loss of pleasure or interest, and sleep or appetite disturbances (Lesperance, Frasure-Smith, & Talajic, 1996).…”