Table 4.

Difference in return-to-work time for all patients between rhBMP-2 and autograft treatment for a 2 years perspective

	Total number of patients	Number of patients returning to work within 2 years	Productivity loss in days of patients returning to work within 2 years	Patients not returning to work within 2 years	Productivity loss in days of patients not returning to work within 2 years	Sum of productivity loss in days within 2 years	Average productivity loss in days per patient within 2 years
Control	402	246	28,590	156	113,880	142,470	354
rhBMP-2	277	188	21,268	89	64,970	86,238	311