Table 5.

Sagittal ROM of adjacent levels

	Single level ACDF	Single level Bryan	Double level ACDF	Double level Bryan
Upper level (°)
Pre-op
Flex	5.1 ± 1.2	4.4 ± 1.4	5.0 ± 0.4	4.6 ± 1.3
Ext	−4.4 ± 1.5	−4.3 ± 1.4	−2.7 ± 1.2	−4.4 ± 1.2
ROM	9.4 ± 1.3	8.7 ± 2.1	7.7 ± 1.1	9.0 ± 1.6
Post-op
Flex	5.8 ± 1.2	4.5 ± 1.4	1.6 ± 0.4	5.1 ± 1.5
Ext	−4.3 ± 1.7	−4.5 ± 1.4	−1.3 ± 0.3	−3.8 ± 0.6
ROM	10.1 ± 1.7	9.1 ± 2.0	2.8 ± 0.7	9.0 ± 2.0
Follow-up
Flex	5.5 ± 1.6	4.6 ± 1.5	2.4 ± 0.2	4.9 ± 1.4
Ext	−4.7 ± 1.6	−4.8 ± 1.5	−2.1 ± 0.2	−4.9 ± 1.5
ROM	10.2 ± 1.4	9.5 ± 2.1	4.3 ± 0.9	9.9 ± 1.8
p value	0.2872		<0.0001
Lower level (°)
Pre-op
Flex	7.5 ± 1.6	4.5 ± 1.5	3.5 ± 0.8	4.9 ± 1.4
Ext	−3.9 ± 0.9	−3.8 ± 1.2	−2.3 ± 0.8	−3.6 ± 0.7
ROM	11.4 ± 2.3	8.3 ± 2.3	5.5 ± 1.7	8.5 ± 1.9
Post-op
Flex	5.0 ± 1.3	4.7 ± 1.5	2.0 ± 0.6	5.1 ± 1.5
Ext	−4.0 ± 1.9	−4.0 ± 1.2	−2.6 ± 0.8	−3.8 ± 0.6
ROM	9.0 ± 2.5	8.7 ± 2.3	4.5 ± 1.5	9.0 ± 2.0
Follow-up
Flex	6.2 ± 2.0	4.8 ± 1.8	3.0 ± 0.4	5.4 ± 1.4
Ext	−4.6 ± 2.1	−4.4 ± 1.4	−3.4 ± 0.7	−4.0 ± 0.8
ROM	10.8 ± 3.4	9.2 ± 2.4	6.2 ± 1.5	9.4 ± 2.1
p value	<0.005		<0.0001

p = 0.05 set value for statistical significance using the mixed model