“… 11 , 14 , 16 , 20 , 22 , 23 , 25 , 26 , 36 Two studies classified SE into three categories (low, moderate, and high). 24 , 27 While, four studies were classified numerically and displayed minimum and maximum values, 11 , 16 , 20 , 23 and five studies do not display minimum and maximum values. 14 , 22 , 25 , 26 , 36 Based on research results, most studies report that SE in CHD patients tends to have a low to moderate average SE level (see Table 1 ).…”