“…For studies that reported potential risk factors, neither age nor gender were associated with anxiety in any study (0 of 5 (25,27,32,37,43) and 0 of 4 (22,27,37,43) studies, respectively). In addition, neither severity of illness, diagnosis at ICU admission, nor ICU/hospital length of stay were associated with anxiety (0 of 4 studies (25,32,35,37), 0 of 4 studies (27,29,35,37) and 0 of 4 studies (25,27,32,35), respectively).…”