“…Most studies included variables relating to momentary experiences, activities, or behaviors occurring before or at the time of report [ 6 , 9 , 13 , 16 , 17 , 21 , 23 - 32 , 39 - 44 , 47 , 48 ]. Some studies also included concurrent symptoms of depression such as fatigue [ 6 , 29 , 36 , 42 , 45 ], pain [ 6 , 16 , 25 , 31 , 36 , 40 , 43 , 45 , 48 , 49 ], stress [ 9 , 10 , 18 - 22 , 26 , 28 , 29 , 32 , 33 , 41 , 42 , 44 , 46 ], anxiety [ 7 , 9 , 10 , 13 , 14 , 16 , 17 , 21 , 24 - 26 , 34 , 39 - 43 , 45 , 47 ], loneliness [ 14 , 20 , 23 , 24 , 27 , 31 , 42 , 46 , 47 ], or cognitive impairment [ 7 ...…”