Table 3.

Summary of pre- and post-exposure mean safety climate scores (0–50 with increasing positive safety climate) across the eight study sites. [SD=standard deviation]

		N	Pre-exposure		Post-exposure		Change in means
			Mean	SD	Mean	SD
1	Intervention	34	43.3	6.8	44.4	7.1	1.1
	Control	25	43.9	6.3	42.0	5.4	−1.9
2	Intervention	120	43.9	5.3	44.4	6.8	0.5
	Control	41	44.5	5.8	43.3	5.9	−1.2
3	Intervention	105	38.4	8.2	40.3	7.7	1.9
	Control	66	42.9	6.9	43.0	6.4	0.1
4	Intervention	168	42.7	6.4	42.1	6.4	−0.6
	Control	45	42.3	6.0	41.0	6.4	−1.3
Mean	Intervention	427	42.0	7.0	42.5	7.1	0.5
	Control	177	43.3	6.4	42.4	6.2	−0.8