Table 2.

Arthrodesis rates

	rhBMP-2		map3
	# of individual sites	Fused (%)	# of individual sites	Fused (%)
1-segment arthrodesis	9	78	11	100
2-segment arthrodesis	18	100	16	81
3-segment arthrodesis	9	89	3	100
Total Segments	36	92	30	90

There was no difference in the proportion of patients who demonstrated radiographic evidence of fusion (Fisher’s exact test, p = 1)