“…Eighteen of 34 studies had specified that patients with breast cancer were one of cancer types under study [ 18 , 19 , 22 , 24 , 25 , 28 – 30 , 32 , 33 , 38 , 40 , 41 , 43 – 47 ]. Hospital Anxiety and Depression Scale (HADS) was the most used questionnaire in the studies ( n = 10, 29.4%) [ 6 , 22 , 26 , 27 , 29 , 31 , 36 , 42 , 46 ]. Generalized Anxiety Disorder 7-item (GAD-7) [ 20 , 28 , 30 , 39 , 40 , 44 , 48 ], Self-Rating Anxiety Scale (SAS) [ 8 , 18 , 19 , 35 , 45 ] and Patient Health Questionnaire (PHQ-9) [ 20 , 40 , 44 , 48 ] were the other frequently used questionnaires.…”