Table 2.

Motions recorded with mobility provocation RSA: rotation, right to left

	Fusion one levelb					Fusion two levelsc
	No plate			Plate		No plate		Plate
	n		Median (range)	n	Median (range)	n	Median (range)	n	Median (range)
Rotations
Transverse axis
3 months	9	0.7 (–2.5;2.5)		11	–0.5 (–1.7;2.5)	5	0.4 (–2.0;1.3)	7	–0.1 (–1.6;12.8)
12 months	8	0.2 (–1.3;2.2)		12	0.5 (–1.4;1.6)	4	0 (3.3;1.6)	8	0.3 (–2.7;1.63)
Longitudinal axis
3 months	9	–0.5 (–2.6;5.7)		11	–1.3 (–3.4;0.8)	5	–1.5 (–2.6;–0.2)	7	0.3 (–4.4;14.62)
12 months	8	0.3 (–0.7;1.2)		12	0 (–2.0;0.9)	4	–0.8 (–1.3;0.4)	8	–0.8 (–1.3;2.1)
Anterior-posterior axis
3 months	9	1.1 (–0.8;2.6)		11	1.6 (–0.2;3.0)	5	0.7 (0.2;2.5)	7	0.7 (–2.6;2.7)
12 months	8	0.1 (–0.5;1.0)		12	0.1 (–0.4;2.6)	4	1.9 (–0.1;4.2)	8	0.2 (–0.6;1.4)
Translations
Transverse axis	11	–0.1 (–0.4;0.1)		14	0 (–0.8;0.2)	7	0 (–0.2;0.3)	8	–0.3 (–0.3;2.6)
3 months	10	0 (–0.3;0.1)		15	–0.1 (–0.7;0.4)	6	–0.1 (–0.6;0.1)	8	0 (–0.5;0.8)
12 months
Longitudinal axis
3 months	11	0 (–0.1;0.2)		14	0 (–0.4;0.3)	7	0 (–0.2;0.3)	8		0 (–0.5;0.2)
12 months	10	0 (–0.2;0.1)		15	0 (–0.1;0.1)	6	0 (–0.3;0)	8		0 (–0.2;0.5)
Anterior-posterior axis
3 months	11	0 (–0.5;0.4)		14	0 (–0.2;0.5)	7	0.1 (–0.3;0.3)	8		0.5 (–0.6;1.6)
12 months	10	0 (–0.2;0.6)		15	0 (–0.1;0.5)	6	–0.3 (–0.7;0.1)	8		0 (–0.9;0.6)
No. of cases with significant motiona
3 months	3			4		1		2
12 months	0			2		1		0

^aAbove the 99% significance limits

^bPatients from the study conducted by Zoëga et al. [14]

^cPatients from the study conducted by Zoëga et al. [15]