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. 2010 Nov 11;11:259. doi: 10.1186/1471-2474-11-259

Table 5.

Mean costs for the intervention and usual care group and the difference in mean costs from an employer's perspective.

Total direct costs Intervention (n = 320)
Mean (SD)		 Usual care (n = 318)
Mean (SD)		 Intervention - Usual care
Difference in costs
Mean (95% CI)2
Total intervention costs3 58.97 (84.74) 28.24 (56.11) 30.73 (18.78; 41.03)

Mean costs per person for the intervention and usual care group and the difference in mean costs (€, 2006 values1) between both groups over 12 months. 1 € = US $1.27; 2 95% confidence interval obtained by bias-corrected and accelerated bootstrapping with 2000 replications; 3 prices according to the professional organisation (Occupational Health Service - Arbo Unie).