Stimulated cervical afferent input increases postural instability in older people with chronic neck pain: a cross-sectional study

Table 3 The mean within-group difference (95% CI) in the postural sway parameters between the neck torsion and neutral positions

		Neck pain	p-value	Controls	p-value
		Mean difference (95% CI)		Mean difference (95% CI)
AP displacement (mm)	EOF-torsion - EOF	-0.09 (-1.77–1.60)	0.92	-0.98 (-2.73–0.77)	0.27
AP displacement (mm)	EOS-torsion - EOS	3.99 (1.21–6.77)	0.01	3.58 (0.69–6.47)	0.02
ML displacement (mm)	EOF-torsion - EOF	5.12 (3.75–6.49)	< 0.001	4.63 (3.24–6.02)	< 0.001
ML displacement (mm)	EOS-torsion - EOS	8.13 (6.10–10.16)	< 0.001	7.14 (5.08–9.19)	< 0.001
Sway area (mm²)	EOF-torsion - EOF	89.18 (10.19–168.17)	0.03	55.08 (-23.91–134.07)	0.17
Sway area (mm²)	EOS-torsion - EOS	343.10 (159.51–526.69)	< 0.001	334.89 (151.30–518.48)	0.001
Velocity (mm/s)	EOF-torsion - EOF	0.72 (0.26–1.17)	0.003	0.65 (0.18–1.12)	0.01
Velocity (mm/s)	EOS-torsion - EOS	1.51 (0.48–2.54)	0.01	1.36 (0.30–2.42)	0.01

AP displacement = anterior-posterior displacement, ML displacement = medial-lateral displacement, EOF = eyes open on a firm surface, EOS = eyes open on a soft surface, EOF-torsion = eyes open on a firm surface with neck torsion, EOS-torsion = eyes open on a soft surface with neck torsion

ISSN: 1471-2318