“…None of these factors were significantly associated with OT, the global PSQI score, or any component scores, thus we did not control for these factors in our analysis. However, prior research links perceived stress, depression, anxiety, and disease status to both OT and sleep quality (Cruess et al, 2003; Fekete et al, 2011; Marion et al, 2009; Nokes & Kendrew, 2001; Phillips et al, 2005; Scantamburlo et al, 2007; Wibbeler, Reichelt, Husstedt, & Evers, 2012). Therefore in order to hold stress and mood levels constant our study controlled for perceived stress, anxiety, and depression.…”