Table 2

Variability in SAQ dimensions within and between the US and Swiss hospital units

	All 54 hospital units (n=1370)		40 US units (n=1057)		14 Swiss units (n=313)		Differences between US and Swiss units
Safety dimensions	Mean value (SD); Min.-Max. Unit %-Positive [% <60%]	F; Sig^*	Mean value (SD); Min.-Max. Unit %- Positive [% <60%]	F; Sig^†	Mean value (SD); Min.-Max. Unit %-Positive [% <60%]	F; Sig^†	F; Sig^‡
Teamwork climate	71.2 (13.9); 35.7–100 [20]	2.66; <0.001	70.9 (13.9); 35.7–100 [23]	2.58; <0.001	72.3 (14.4); 50–95.8 [14]	3.59; <0.001	0.105; 0.747
Safety climate	66.0 (14.8); 29.4–90.5 [26]	2.02; <0.001	68.7 (13.8); 33.3–90.5 [20]	1.61; <0.001	58.4 (15.1); 29.4–83.3 [43]	3.73; <0.001	5.444; 0.024
Job satisfaction	77.6 (13.2); 46.2–100 [9]	2.73; <0.001	79.0 (12.8); 46.2–100 [8]	2.60; <0.001	73.9 (13.8); 47.1–95 [14]	3.53; <0.001	1.536; 0.221
Stress recognition	50.5 (15.8); 8.3–74.2 [67]	1.02; 0.433	57.2 (10.0); 28.6–74.2 [55]	0.92; 0.584	31.4 (13.8); 8.3–55 [100]	1.29; 0.222	56.920; <0.001
Perceptions of unit management	55.3 (17.0); 16.7–91.7 [61]	2.54; <0.001	60.1 (16.4); 16.7–91.7 [48]	2.97; <0.001	41.5 (9.5); 28–57.1 [100]	0.91; 0.541	15.863; <0.001
Working conditions	62.0 (15.3); 21.4–100 [43]	1.24; 0.143	60.7 (16.1); 21.4–100 [45]	0.92; 0.589	66.0 (12.6); 44.1–83.3 [36]	2.73; 0.002	1.269; 0.265

Score values of safety attitudes dimensions, range of % positive respondents and [% positive respondents below 60% thresholds].
↵* ANOVA for each safety dimension controlled for country and hospital level with significance testing for unit variability.
↵† ANOVA for each safety dimension controlled for hospital level with significance testing for unit variability.
↵‡ General linear models for between-the-country differences of safety dimensions score values at the unit level.