Table 2

Mean (SD) for safety measures and correlations between measures (N=33 wards)

	Mean (SD)	% harm-free care	Friends and family test	PMOS mean score	HSOPSC—perceptions of safety	HSOPSC—patient safety grade	HSOPSC—frequency of events
% harm-free care (0–100)	91.61 (5.97)
Friends and family test (1–6)	4.38 (0.25)	0.29
PMOS mean score (0–5)	3.84 (0.17)	0.58***	0.69***
HSOPSC—perceptions of safety	3.54 (0.39)	0.48**	-0.05	0.25
HSOPSC—patient safety grade	3.80 (0.44)	0.54***	0.11	0.30	0.91***
HSOPSC—frequency of events	4.04 (0.33	0.04	0.12	0.03	0.48**	0.56**
HSOPSC—number of events reported	2.39 (0.52)	−0.41*	−0.39*	−0.43*	−0.47**	−0.44*	−0.36*

*p<0.05; ** p<0.01; *** p<0.001.
% harm-free care, percentage of patients receiving harm-free care; HSOPSC, Hospital Survey of Patient Safety Culture; PMOS, Patient Measure of Safety.