“…Of the 29 studies examining registered nurse staffing, 19 reported higher levels of this staff grade and compliance were positively associated (15, 36, 47–49, 56–58, 79, 88, 90, 93, 113, 120, 138, 153–156) , nine reported a null association (16, 52, 61, 65, 92, 96, 124, 126, 157) and one reported a negative association. (87) Likewise, total nurse staffing levels (all grades of nurse staff) and compliance were positively associated in eleven studies (36, 45, 51, 54, 87, 110, 111, 128, 153, 156, 158) , with two finding a negative association (49, 111) and three a null association. (37, 72, 84) The results are similar for nurse aides/care assistants: 15 studies reported higher levels these staff and compliance were positively associated (15, 35, 37, 48, 49, 51, 54, 56, 58, 79, 90, 126, 128, 138, 154, 156) , nine reported a null association (16, 52, 61, 88, 89, 110, 113, 120, 155) and three reported a negative association.…”