“…However, previous results are conflicting. Whereas some epidemiological and ambulatory studies (Ostir et al, 2006;Shapiro et al, 1997;Southard et al, 1986Southard et al, , 1988 have reported associations between negative mood and hypertension, positive emotion and low systolic blood pressure (SBP), and/or positive emotion and low diastolic blood pressure (DBP), others have found negative mood to be associated with lower levels of SBP (Lenoir et al, 2008;Kim et al, 2010;Pilgrim et al, 1992). Some laboratory and epidemiological studies have found no significant association between BP and mood (Brondolo et al, 1999;Donner-Banzhoff et al, 1997) or a non-linear relationshipwith negative mood associated with both low and high DBP compared to mid-range group (Barrett-Connor and Palinkas, 1994).…”